Home / 31,520.80-47,216.40-21,671.20

Finding the Fourth Proportional to 31,520.80, 47,216.40 and 21,671.20

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Solution

The fourth proportional to 31,520.80, 47,216.40 and 21,671.20 is: 32,462.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,520.80 : 47,216.40 = 21,671.20 : x
  2. Step 2: Convert to fraction form
    31,520.80/47,216.40 = 21,671.20/x
  3. Step 3: Cross multiply
    31,520.80x = 47,216.40 × 21,671.20
  4. Step 4: Simplify right side
    31,520.80x = 1,023,236,047.68
  5. Step 5: Solve for x
    x = 1,023,236,047.68/31,520.80
  6. Step 6: Final answer
    x = 32,462.25

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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.