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Finding the Fourth Proportional to 15,920.40, 23,836.80 and 8,113.68

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Solution

The fourth proportional to 15,920.40, 23,836.80 and 8,113.68 is: 12,148.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,920.40 : 23,836.80 = 8,113.68 : x
  2. Step 2: Convert to fraction form
    15,920.40/23,836.80 = 8,113.68/x
  3. Step 3: Cross multiply
    15,920.40x = 23,836.80 × 8,113.68
  4. Step 4: Simplify right side
    15,920.40x = 193,404,167.42
  5. Step 5: Solve for x
    x = 193,404,167.42/15,920.40
  6. Step 6: Final answer
    x = 12,148.20

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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.