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Finding the Fourth Proportional to 10,615.32, 15,922.98 and 4,378.86

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Solution

The fourth proportional to 10,615.32, 15,922.98 and 4,378.86 is: 6,568.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,615.32 : 15,922.98 = 4,378.86 : x
  2. Step 2: Convert to fraction form
    10,615.32/15,922.98 = 4,378.86/x
  3. Step 3: Cross multiply
    10,615.32x = 15,922.98 × 4,378.86
  4. Step 4: Simplify right side
    10,615.32x = 69,724,500.20
  5. Step 5: Solve for x
    x = 69,724,500.20/10,615.32
  6. Step 6: Final answer
    x = 6,568.29

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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.