Home / 21,041.60-31,562.40-12,747.20

Finding the Fourth Proportional to 21,041.60, 31,562.40 and 12,747.20

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Solution

The fourth proportional to 21,041.60, 31,562.40 and 12,747.20 is: 19,120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,041.60 : 31,562.40 = 12,747.20 : x
  2. Step 2: Convert to fraction form
    21,041.60/31,562.40 = 12,747.20/x
  3. Step 3: Cross multiply
    21,041.60x = 31,562.40 × 12,747.20
  4. Step 4: Simplify right side
    21,041.60x = 402,332,225.28
  5. Step 5: Solve for x
    x = 402,332,225.28/21,041.60
  6. Step 6: Final answer
    x = 19,120.80

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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.