Home / 22,491.28-31,031.40-12,929.68

Finding the Fourth Proportional to 22,491.28, 31,031.40 and 12,929.68

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Solution

The fourth proportional to 22,491.28, 31,031.40 and 12,929.68 is: 17,839.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,491.28 : 31,031.40 = 12,929.68 : x
  2. Step 2: Convert to fraction form
    22,491.28/31,031.40 = 12,929.68/x
  3. Step 3: Cross multiply
    22,491.28x = 31,031.40 × 12,929.68
  4. Step 4: Simplify right side
    22,491.28x = 401,226,071.95
  5. Step 5: Solve for x
    x = 401,226,071.95/22,491.28
  6. Step 6: Final answer
    x = 17,839.18

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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.