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Finding the Fourth Proportional to 11,355.57, 15,670.68 and 6,387.57

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Solution

The fourth proportional to 11,355.57, 15,670.68 and 6,387.57 is: 8,814.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.57 : 15,670.68 = 6,387.57 : x
  2. Step 2: Convert to fraction form
    11,355.57/15,670.68 = 6,387.57/x
  3. Step 3: Cross multiply
    11,355.57x = 15,670.68 × 6,387.57
  4. Step 4: Simplify right side
    11,355.57x = 100,097,565.45
  5. Step 5: Solve for x
    x = 100,097,565.45/11,355.57
  6. Step 6: Final answer
    x = 8,814.84

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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.