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Finding the Fourth Proportional to 15,157.13, 20,918.66 and 8,869.50

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Solution

The fourth proportional to 15,157.13, 20,918.66 and 8,869.50 is: 12,240.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.13 : 20,918.66 = 8,869.50 : x
  2. Step 2: Convert to fraction form
    15,157.13/20,918.66 = 8,869.50/x
  3. Step 3: Cross multiply
    15,157.13x = 20,918.66 × 8,869.50
  4. Step 4: Simplify right side
    15,157.13x = 185,538,010.52
  5. Step 5: Solve for x
    x = 185,538,010.52/15,157.13
  6. Step 6: Final answer
    x = 12,240.98

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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.