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Finding the Fourth Proportional to 15,057.69, 20,779.25 and 8,343.20

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Solution

The fourth proportional to 15,057.69, 20,779.25 and 8,343.20 is: 11,513.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,057.69 : 20,779.25 = 8,343.20 : x
  2. Step 2: Convert to fraction form
    15,057.69/20,779.25 = 8,343.20/x
  3. Step 3: Cross multiply
    15,057.69x = 20,779.25 × 8,343.20
  4. Step 4: Simplify right side
    15,057.69x = 173,365,292.99
  5. Step 5: Solve for x
    x = 173,365,292.99/15,057.69
  6. Step 6: Final answer
    x = 11,513.41

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.