Home / 21,127.46-29,143.14-13,571.24

Finding the Fourth Proportional to 21,127.46, 29,143.14 and 13,571.24

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Solution

The fourth proportional to 21,127.46, 29,143.14 and 13,571.24 is: 18,720.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.46 : 29,143.14 = 13,571.24 : x
  2. Step 2: Convert to fraction form
    21,127.46/29,143.14 = 13,571.24/x
  3. Step 3: Cross multiply
    21,127.46x = 29,143.14 × 13,571.24
  4. Step 4: Simplify right side
    21,127.46x = 395,508,547.29
  5. Step 5: Solve for x
    x = 395,508,547.29/21,127.46
  6. Step 6: Final answer
    x = 18,720.12

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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.