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Finding the Fourth Proportional to 31,102.39, 42,920.02 and 17,490.04

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Solution

The fourth proportional to 31,102.39, 42,920.02 and 17,490.04 is: 24,135.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,102.39 : 42,920.02 = 17,490.04 : x
  2. Step 2: Convert to fraction form
    31,102.39/42,920.02 = 17,490.04/x
  3. Step 3: Cross multiply
    31,102.39x = 42,920.02 × 17,490.04
  4. Step 4: Simplify right side
    31,102.39x = 750,673,047.18
  5. Step 5: Solve for x
    x = 750,673,047.18/31,102.39
  6. Step 6: Final answer
    x = 24,135.54

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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.