Home / 20,641.59-28,492.11-12,143.25

Finding the Fourth Proportional to 20,641.59, 28,492.11 and 12,143.25

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Solution

The fourth proportional to 20,641.59, 28,492.11 and 12,143.25 is: 16,761.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.59 : 28,492.11 = 12,143.25 : x
  2. Step 2: Convert to fraction form
    20,641.59/28,492.11 = 12,143.25/x
  3. Step 3: Cross multiply
    20,641.59x = 28,492.11 × 12,143.25
  4. Step 4: Simplify right side
    20,641.59x = 345,986,814.76
  5. Step 5: Solve for x
    x = 345,986,814.76/20,641.59
  6. Step 6: Final answer
    x = 16,761.64

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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.