Home / 31,585.52-47,424.90-21,120.80

Finding the Fourth Proportional to 31,585.52, 47,424.90 and 21,120.80

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Solution

The fourth proportional to 31,585.52, 47,424.90 and 21,120.80 is: 31,712.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,585.52 : 47,424.90 = 21,120.80 : x
  2. Step 2: Convert to fraction form
    31,585.52/47,424.90 = 21,120.80/x
  3. Step 3: Cross multiply
    31,585.52x = 47,424.90 × 21,120.80
  4. Step 4: Simplify right side
    31,585.52x = 1,001,651,827.92
  5. Step 5: Solve for x
    x = 1,001,651,827.92/31,585.52
  6. Step 6: Final answer
    x = 31,712.37

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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.