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Finding the Fourth Proportional to 7,277.60, 10,916.40 and 6,471.20

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Solution

The fourth proportional to 7,277.60, 10,916.40 and 6,471.20 is: 9,706.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,277.60 : 10,916.40 = 6,471.20 : x
  2. Step 2: Convert to fraction form
    7,277.60/10,916.40 = 6,471.20/x
  3. Step 3: Cross multiply
    7,277.60x = 10,916.40 × 6,471.20
  4. Step 4: Simplify right side
    7,277.60x = 70,642,207.68
  5. Step 5: Solve for x
    x = 70,642,207.68/7,277.60
  6. Step 6: Final answer
    x = 9,706.80

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Similar ratio
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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.