Home / 57,766.40-86,655.36-20,821.76

Finding the Fourth Proportional to 57,766.40, 86,655.36 and 20,821.76

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Solution

The fourth proportional to 57,766.40, 86,655.36 and 20,821.76 is: 31,234.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,766.40 : 86,655.36 = 20,821.76 : x
  2. Step 2: Convert to fraction form
    57,766.40/86,655.36 = 20,821.76/x
  3. Step 3: Cross multiply
    57,766.40x = 86,655.36 × 20,821.76
  4. Step 4: Simplify right side
    57,766.40x = 1,804,317,108.63
  5. Step 5: Solve for x
    x = 1,804,317,108.63/57,766.40
  6. Step 6: Final answer
    x = 31,234.72

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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.