Home / 28,655.76-42,972.71-11,121.48

Finding the Fourth Proportional to 28,655.76, 42,972.71 and 11,121.48

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Solution

The fourth proportional to 28,655.76, 42,972.71 and 11,121.48 is: 16,677.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,655.76 : 42,972.71 = 11,121.48 : x
  2. Step 2: Convert to fraction form
    28,655.76/42,972.71 = 11,121.48/x
  3. Step 3: Cross multiply
    28,655.76x = 42,972.71 × 11,121.48
  4. Step 4: Simplify right side
    28,655.76x = 477,920,079.20
  5. Step 5: Solve for x
    x = 477,920,079.20/28,655.76
  6. Step 6: Final answer
    x = 16,677.98

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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.