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Finding the Fourth Proportional to 22,479.01, 31,020.72 and 12,407.64

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Solution

The fourth proportional to 22,479.01, 31,020.72 and 12,407.64 is: 17,122.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,479.01 : 31,020.72 = 12,407.64 : x
  2. Step 2: Convert to fraction form
    22,479.01/31,020.72 = 12,407.64/x
  3. Step 3: Cross multiply
    22,479.01x = 31,020.72 × 12,407.64
  4. Step 4: Simplify right side
    22,479.01x = 384,893,763.44
  5. Step 5: Solve for x
    x = 384,893,763.44/22,479.01
  6. Step 6: Final answer
    x = 17,122.36

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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.