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Finding the Fourth Proportional to 7,715.10, 11,572.65 and 7,412.70

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Solution

The fourth proportional to 7,715.10, 11,572.65 and 7,412.70 is: 11,119.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.10 : 11,572.65 = 7,412.70 : x
  2. Step 2: Convert to fraction form
    7,715.10/11,572.65 = 7,412.70/x
  3. Step 3: Cross multiply
    7,715.10x = 11,572.65 × 7,412.70
  4. Step 4: Simplify right side
    7,715.10x = 85,784,582.66
  5. Step 5: Solve for x
    x = 85,784,582.66/7,715.10
  6. Step 6: Final answer
    x = 11,119.05

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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.