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Finding the Fourth Proportional to 28,035.99, 42,046.80 and 8,309.94

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Solution

The fourth proportional to 28,035.99, 42,046.80 and 8,309.94 is: 12,462.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,035.99 : 42,046.80 = 8,309.94 : x
  2. Step 2: Convert to fraction form
    28,035.99/42,046.80 = 8,309.94/x
  3. Step 3: Cross multiply
    28,035.99x = 42,046.80 × 8,309.94
  4. Step 4: Simplify right side
    28,035.99x = 349,406,385.19
  5. Step 5: Solve for x
    x = 349,406,385.19/28,035.99
  6. Step 6: Final answer
    x = 12,462.78

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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.