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Finding the Fourth Proportional to 12,617.53, 18,931.76 and 6,767.31

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Solution

The fourth proportional to 12,617.53, 18,931.76 and 6,767.31 is: 10,153.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,617.53 : 18,931.76 = 6,767.31 : x
  2. Step 2: Convert to fraction form
    12,617.53/18,931.76 = 6,767.31/x
  3. Step 3: Cross multiply
    12,617.53x = 18,931.76 × 6,767.31
  4. Step 4: Simplify right side
    12,617.53x = 128,117,088.77
  5. Step 5: Solve for x
    x = 128,117,088.77/12,617.53
  6. Step 6: Final answer
    x = 10,153.90

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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.