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Finding the Fourth Proportional to 28,059.99, 42,089.79 and 6,999.93

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Solution

The fourth proportional to 28,059.99, 42,089.79 and 6,999.93 is: 10,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,059.99 : 42,089.79 = 6,999.93 : x
  2. Step 2: Convert to fraction form
    28,059.99/42,089.79 = 6,999.93/x
  3. Step 3: Cross multiply
    28,059.99x = 42,089.79 × 6,999.93
  4. Step 4: Simplify right side
    28,059.99x = 294,625,583.71
  5. Step 5: Solve for x
    x = 294,625,583.71/28,059.99
  6. Step 6: Final answer
    x = 10,499.85

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.