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Finding the Fourth Proportional to 16,617.28, 22,931.21 and 9,165.28

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Solution

The fourth proportional to 16,617.28, 22,931.21 and 9,165.28 is: 12,647.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,617.28 : 22,931.21 = 9,165.28 : x
  2. Step 2: Convert to fraction form
    16,617.28/22,931.21 = 9,165.28/x
  3. Step 3: Cross multiply
    16,617.28x = 22,931.21 × 9,165.28
  4. Step 4: Simplify right side
    16,617.28x = 210,170,960.39
  5. Step 5: Solve for x
    x = 210,170,960.39/16,617.28
  6. Step 6: Final answer
    x = 12,647.74

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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.