Home / 22,515.78-31,070.91-12,958.74

Finding the Fourth Proportional to 22,515.78, 31,070.91 and 12,958.74

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Solution

The fourth proportional to 22,515.78, 31,070.91 and 12,958.74 is: 17,882.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,515.78 : 31,070.91 = 12,958.74 : x
  2. Step 2: Convert to fraction form
    22,515.78/31,070.91 = 12,958.74/x
  3. Step 3: Cross multiply
    22,515.78x = 31,070.91 × 12,958.74
  4. Step 4: Simplify right side
    22,515.78x = 402,639,844.25
  5. Step 5: Solve for x
    x = 402,639,844.25/22,515.78
  6. Step 6: Final answer
    x = 17,882.56

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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.