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Finding the Fourth Proportional to 7,151.60, 10,727.40 and 5,920.40

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Solution

The fourth proportional to 7,151.60, 10,727.40 and 5,920.40 is: 8,880.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,151.60 : 10,727.40 = 5,920.40 : x
  2. Step 2: Convert to fraction form
    7,151.60/10,727.40 = 5,920.40/x
  3. Step 3: Cross multiply
    7,151.60x = 10,727.40 × 5,920.40
  4. Step 4: Simplify right side
    7,151.60x = 63,510,498.96
  5. Step 5: Solve for x
    x = 63,510,498.96/7,151.60
  6. Step 6: Final answer
    x = 8,880.60

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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.