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Finding the Fourth Proportional to 8,708.49, 12,019.64 and 5,724.60

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Solution

The fourth proportional to 8,708.49, 12,019.64 and 5,724.60 is: 7,901.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.49 : 12,019.64 = 5,724.60 : x
  2. Step 2: Convert to fraction form
    8,708.49/12,019.64 = 5,724.60/x
  3. Step 3: Cross multiply
    8,708.49x = 12,019.64 × 5,724.60
  4. Step 4: Simplify right side
    8,708.49x = 68,807,602.52
  5. Step 5: Solve for x
    x = 68,807,602.52/8,708.49
  6. Step 6: Final answer
    x = 7,901.21

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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.