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Finding the Fourth Proportional to 31,590.80, 47,456.60 and 26,406.80

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Solution

The fourth proportional to 31,590.80, 47,456.60 and 26,406.80 is: 39,669.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,590.80 : 47,456.60 = 26,406.80 : x
  2. Step 2: Convert to fraction form
    31,590.80/47,456.60 = 26,406.80/x
  3. Step 3: Cross multiply
    31,590.80x = 47,456.60 × 26,406.80
  4. Step 4: Simplify right side
    31,590.80x = 1,253,176,944.88
  5. Step 5: Solve for x
    x = 1,253,176,944.88/31,590.80
  6. Step 6: Final answer
    x = 39,669.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.