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Finding the Fourth Proportional to 7,772.60, 10,701.42 and 7,242.68

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Solution

The fourth proportional to 7,772.60, 10,701.42 and 7,242.68 is: 9,971.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,772.60 : 10,701.42 = 7,242.68 : x
  2. Step 2: Convert to fraction form
    7,772.60/10,701.42 = 7,242.68/x
  3. Step 3: Cross multiply
    7,772.60x = 10,701.42 × 7,242.68
  4. Step 4: Simplify right side
    7,772.60x = 77,506,960.61
  5. Step 5: Solve for x
    x = 77,506,960.61/7,772.60
  6. Step 6: Final answer
    x = 9,971.82

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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.