Home / 21,630.13-29,851.68-13,130.31

Finding the Fourth Proportional to 21,630.13, 29,851.68 and 13,130.31

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Solution

The fourth proportional to 21,630.13, 29,851.68 and 13,130.31 is: 18,121.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,630.13 : 29,851.68 = 13,130.31 : x
  2. Step 2: Convert to fraction form
    21,630.13/29,851.68 = 13,130.31/x
  3. Step 3: Cross multiply
    21,630.13x = 29,851.68 × 13,130.31
  4. Step 4: Simplify right side
    21,630.13x = 391,961,812.42
  5. Step 5: Solve for x
    x = 391,961,812.42/21,630.13
  6. Step 6: Final answer
    x = 18,121.10

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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.