Home / 20,088.40-30,143.40-8,402.80

Finding the Fourth Proportional to 20,088.40, 30,143.40 and 8,402.80

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Solution

The fourth proportional to 20,088.40, 30,143.40 and 8,402.80 is: 12,608.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088.40 : 30,143.40 = 8,402.80 : x
  2. Step 2: Convert to fraction form
    20,088.40/30,143.40 = 8,402.80/x
  3. Step 3: Cross multiply
    20,088.40x = 30,143.40 × 8,402.80
  4. Step 4: Simplify right side
    20,088.40x = 253,288,961.52
  5. Step 5: Solve for x
    x = 253,288,961.52/20,088.40
  6. Step 6: Final answer
    x = 12,608.72

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1.5x scale

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.