Home / 15,613.78-21,549.10-10,040.98

Finding the Fourth Proportional to 15,613.78, 21,549.10 and 10,040.98

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Solution

The fourth proportional to 15,613.78, 21,549.10 and 10,040.98 is: 13,857.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,613.78 : 21,549.10 = 10,040.98 : x
  2. Step 2: Convert to fraction form
    15,613.78/21,549.10 = 10,040.98/x
  3. Step 3: Cross multiply
    15,613.78x = 21,549.10 × 10,040.98
  4. Step 4: Simplify right side
    15,613.78x = 216,374,082.12
  5. Step 5: Solve for x
    x = 216,374,082.12/15,613.78
  6. Step 6: Final answer
    x = 13,857.89

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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.