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Finding the Fourth Proportional to 15,059.69, 20,780.24 and 8,345.70

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Solution

The fourth proportional to 15,059.69, 20,780.24 and 8,345.70 is: 11,515.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,059.69 : 20,780.24 = 8,345.70 : x
  2. Step 2: Convert to fraction form
    15,059.69/20,780.24 = 8,345.70/x
  3. Step 3: Cross multiply
    15,059.69x = 20,780.24 × 8,345.70
  4. Step 4: Simplify right side
    15,059.69x = 173,425,607.24
  5. Step 5: Solve for x
    x = 173,425,607.24/15,059.69
  6. Step 6: Final answer
    x = 11,515.89

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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.