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Finding the Fourth Proportional to 8,404.54, 12,590.10 and 7,715.63

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Solution

The fourth proportional to 8,404.54, 12,590.10 and 7,715.63 is: 11,558.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,404.54 : 12,590.10 = 7,715.63 : x
  2. Step 2: Convert to fraction form
    8,404.54/12,590.10 = 7,715.63/x
  3. Step 3: Cross multiply
    8,404.54x = 12,590.10 × 7,715.63
  4. Step 4: Simplify right side
    8,404.54x = 97,140,553.26
  5. Step 5: Solve for x
    x = 97,140,553.26/8,404.54
  6. Step 6: Final answer
    x = 11,558.10

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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.