Home / 21,644.47-29,864.28-13,146.36

Finding the Fourth Proportional to 21,644.47, 29,864.28 and 13,146.36

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Solution

The fourth proportional to 21,644.47, 29,864.28 and 13,146.36 is: 18,138.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,644.47 : 29,864.28 = 13,146.36 : x
  2. Step 2: Convert to fraction form
    21,644.47/29,864.28 = 13,146.36/x
  3. Step 3: Cross multiply
    21,644.47x = 29,864.28 × 13,146.36
  4. Step 4: Simplify right side
    21,644.47x = 392,606,576.02
  5. Step 5: Solve for x
    x = 392,606,576.02/21,644.47
  6. Step 6: Final answer
    x = 18,138.89

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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.