Home / 20,411.72-28,168.69-11,459.90

Finding the Fourth Proportional to 20,411.72, 28,168.69 and 11,459.90

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Solution

The fourth proportional to 20,411.72, 28,168.69 and 11,459.90 is: 15,814.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.72 : 28,168.69 = 11,459.90 : x
  2. Step 2: Convert to fraction form
    20,411.72/28,168.69 = 11,459.90/x
  3. Step 3: Cross multiply
    20,411.72x = 28,168.69 × 11,459.90
  4. Step 4: Simplify right side
    20,411.72x = 322,810,370.53
  5. Step 5: Solve for x
    x = 322,810,370.53/20,411.72
  6. Step 6: Final answer
    x = 15,814.95

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1.5x scale

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.