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Finding the Fourth Proportional to 8,487.81, 11,713.28 and 4,711.05

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Solution

The fourth proportional to 8,487.81, 11,713.28 and 4,711.05 is: 6,501.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,487.81 : 11,713.28 = 4,711.05 : x
  2. Step 2: Convert to fraction form
    8,487.81/11,713.28 = 4,711.05/x
  3. Step 3: Cross multiply
    8,487.81x = 11,713.28 × 4,711.05
  4. Step 4: Simplify right side
    8,487.81x = 55,181,824.19
  5. Step 5: Solve for x
    x = 55,181,824.19/8,487.81
  6. Step 6: Final answer
    x = 6,501.30

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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.