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Finding the Fourth Proportional to 22,630.32, 31,229 and 12,559.20

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Solution

The fourth proportional to 22,630.32, 31,229 and 12,559.20 is: 17,331.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,630.32 : 31,229 = 12,559.20 : x
  2. Step 2: Convert to fraction form
    22,630.32/31,229 = 12,559.20/x
  3. Step 3: Cross multiply
    22,630.32x = 31,229 × 12,559.20
  4. Step 4: Simplify right side
    22,630.32x = 392,211,256.80
  5. Step 5: Solve for x
    x = 392,211,256.80/22,630.32
  6. Step 6: Final answer
    x = 17,331.23

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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.