Home / 31,955.10-47,932.65-20,319.90

Finding the Fourth Proportional to 31,955.10, 47,932.65 and 20,319.90

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Solution

The fourth proportional to 31,955.10, 47,932.65 and 20,319.90 is: 30,479.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,955.10 : 47,932.65 = 20,319.90 : x
  2. Step 2: Convert to fraction form
    31,955.10/47,932.65 = 20,319.90/x
  3. Step 3: Cross multiply
    31,955.10x = 47,932.65 × 20,319.90
  4. Step 4: Simplify right side
    31,955.10x = 973,986,654.74
  5. Step 5: Solve for x
    x = 973,986,654.74/31,955.10
  6. Step 6: Final answer
    x = 30,479.85

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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.