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Finding the Fourth Proportional to 12,417.70, 17,134.53 and 7,381.81

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Solution

The fourth proportional to 12,417.70, 17,134.53 and 7,381.81 is: 10,185.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,417.70 : 17,134.53 = 7,381.81 : x
  2. Step 2: Convert to fraction form
    12,417.70/17,134.53 = 7,381.81/x
  3. Step 3: Cross multiply
    12,417.70x = 17,134.53 × 7,381.81
  4. Step 4: Simplify right side
    12,417.70x = 126,483,844.90
  5. Step 5: Solve for x
    x = 126,483,844.90/12,417.70
  6. Step 6: Final answer
    x = 10,185.77

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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.