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Finding the Fourth Proportional to 7,663.60, 10,575.78 and 4,479.12

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Solution

The fourth proportional to 7,663.60, 10,575.78 and 4,479.12 is: 6,181.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,663.60 : 10,575.78 = 4,479.12 : x
  2. Step 2: Convert to fraction form
    7,663.60/10,575.78 = 4,479.12/x
  3. Step 3: Cross multiply
    7,663.60x = 10,575.78 × 4,479.12
  4. Step 4: Simplify right side
    7,663.60x = 47,370,187.71
  5. Step 5: Solve for x
    x = 47,370,187.71/7,663.60
  6. Step 6: Final answer
    x = 6,181.19

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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.