Home / 15,613.70-21,515.02-11,127.92

Finding the Fourth Proportional to 15,613.70, 21,515.02 and 11,127.92

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Solution

The fourth proportional to 15,613.70, 21,515.02 and 11,127.92 is: 15,333.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,613.70 : 21,515.02 = 11,127.92 : x
  2. Step 2: Convert to fraction form
    15,613.70/21,515.02 = 11,127.92/x
  3. Step 3: Cross multiply
    15,613.70x = 21,515.02 × 11,127.92
  4. Step 4: Simplify right side
    15,613.70x = 239,417,285.96
  5. Step 5: Solve for x
    x = 239,417,285.96/15,613.70
  6. Step 6: Final answer
    x = 15,333.80

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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.