Home / 31,042.32-42,832.74-20,284.35

Finding the Fourth Proportional to 31,042.32, 42,832.74 and 20,284.35

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Solution

The fourth proportional to 31,042.32, 42,832.74 and 20,284.35 is: 27,988.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,042.32 : 42,832.74 = 20,284.35 : x
  2. Step 2: Convert to fraction form
    31,042.32/42,832.74 = 20,284.35/x
  3. Step 3: Cross multiply
    31,042.32x = 42,832.74 × 20,284.35
  4. Step 4: Simplify right side
    31,042.32x = 868,834,289.62
  5. Step 5: Solve for x
    x = 868,834,289.62/31,042.32
  6. Step 6: Final answer
    x = 27,988.70

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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.