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Finding the Fourth Proportional to 7,489.68, 10,328.76 and 5,921.52

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Solution

The fourth proportional to 7,489.68, 10,328.76 and 5,921.52 is: 8,166.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,489.68 : 10,328.76 = 5,921.52 : x
  2. Step 2: Convert to fraction form
    7,489.68/10,328.76 = 5,921.52/x
  3. Step 3: Cross multiply
    7,489.68x = 10,328.76 × 5,921.52
  4. Step 4: Simplify right side
    7,489.68x = 61,161,958.92
  5. Step 5: Solve for x
    x = 61,161,958.92/7,489.68
  6. Step 6: Final answer
    x = 8,166.16

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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.