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Finding the Fourth Proportional to 18,779.99, 28,170.08 and 6,300.98

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Solution

The fourth proportional to 18,779.99, 28,170.08 and 6,300.98 is: 9,451.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.99 : 28,170.08 = 6,300.98 : x
  2. Step 2: Convert to fraction form
    18,779.99/28,170.08 = 6,300.98/x
  3. Step 3: Cross multiply
    18,779.99x = 28,170.08 × 6,300.98
  4. Step 4: Simplify right side
    18,779.99x = 177,498,938.32
  5. Step 5: Solve for x
    x = 177,498,938.32/18,779.99
  6. Step 6: Final answer
    x = 9,451.50

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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.