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Finding the Fourth Proportional to 8,807.68, 13,213.14 and 7,178.68

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Solution

The fourth proportional to 8,807.68, 13,213.14 and 7,178.68 is: 10,769.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,807.68 : 13,213.14 = 7,178.68 : x
  2. Step 2: Convert to fraction form
    8,807.68/13,213.14 = 7,178.68/x
  3. Step 3: Cross multiply
    8,807.68x = 13,213.14 × 7,178.68
  4. Step 4: Simplify right side
    8,807.68x = 94,852,903.86
  5. Step 5: Solve for x
    x = 94,852,903.86/8,807.68
  6. Step 6: Final answer
    x = 10,769.34

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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.