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Finding the Fourth Proportional to 15,800.40, 23,711.40 and 8,780.40

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Solution

The fourth proportional to 15,800.40, 23,711.40 and 8,780.40 is: 13,176.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,800.40 : 23,711.40 = 8,780.40 : x
  2. Step 2: Convert to fraction form
    15,800.40/23,711.40 = 8,780.40/x
  3. Step 3: Cross multiply
    15,800.40x = 23,711.40 × 8,780.40
  4. Step 4: Simplify right side
    15,800.40x = 208,195,576.56
  5. Step 5: Solve for x
    x = 208,195,576.56/15,800.40
  6. Step 6: Final answer
    x = 13,176.60

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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.