Home / 20,943.61-28,899.61-12,445.90

Finding the Fourth Proportional to 20,943.61, 28,899.61 and 12,445.90

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Solution

The fourth proportional to 20,943.61, 28,899.61 and 12,445.90 is: 17,173.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.61 : 28,899.61 = 12,445.90 : x
  2. Step 2: Convert to fraction form
    20,943.61/28,899.61 = 12,445.90/x
  3. Step 3: Cross multiply
    20,943.61x = 28,899.61 × 12,445.90
  4. Step 4: Simplify right side
    20,943.61x = 359,681,750.30
  5. Step 5: Solve for x
    x = 359,681,750.30/20,943.61
  6. Step 6: Final answer
    x = 17,173.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.