Home / 21,425.40-29,564.87-12,351.78

Finding the Fourth Proportional to 21,425.40, 29,564.87 and 12,351.78

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Solution

The fourth proportional to 21,425.40, 29,564.87 and 12,351.78 is: 17,044.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,425.40 : 29,564.87 = 12,351.78 : x
  2. Step 2: Convert to fraction form
    21,425.40/29,564.87 = 12,351.78/x
  3. Step 3: Cross multiply
    21,425.40x = 29,564.87 × 12,351.78
  4. Step 4: Simplify right side
    21,425.40x = 365,178,708.21
  5. Step 5: Solve for x
    x = 365,178,708.21/21,425.40
  6. Step 6: Final answer
    x = 17,044.20

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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.