Home / 31,677.70-43,702.79-20,345.62

Finding the Fourth Proportional to 31,677.70, 43,702.79 and 20,345.62

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Solution

The fourth proportional to 31,677.70, 43,702.79 and 20,345.62 is: 28,068.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,677.70 : 43,702.79 = 20,345.62 : x
  2. Step 2: Convert to fraction form
    31,677.70/43,702.79 = 20,345.62/x
  3. Step 3: Cross multiply
    31,677.70x = 43,702.79 × 20,345.62
  4. Step 4: Simplify right side
    31,677.70x = 889,160,358.28
  5. Step 5: Solve for x
    x = 889,160,358.28/31,677.70
  6. Step 6: Final answer
    x = 28,068.97

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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.