Home / 21,127.24-29,129.10-13,560.20

Finding the Fourth Proportional to 21,127.24, 29,129.10 and 13,560.20

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Solution

The fourth proportional to 21,127.24, 29,129.10 and 13,560.20 is: 18,696.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.24 : 29,129.10 = 13,560.20 : x
  2. Step 2: Convert to fraction form
    21,127.24/29,129.10 = 13,560.20/x
  3. Step 3: Cross multiply
    21,127.24x = 29,129.10 × 13,560.20
  4. Step 4: Simplify right side
    21,127.24x = 394,996,421.82
  5. Step 5: Solve for x
    x = 394,996,421.82/21,127.24
  6. Step 6: Final answer
    x = 18,696.07

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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.