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Finding the Fourth Proportional to 13,224.61, 18,248.61 and 7,919.29

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Solution

The fourth proportional to 13,224.61, 18,248.61 and 7,919.29 is: 10,927.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,224.61 : 18,248.61 = 7,919.29 : x
  2. Step 2: Convert to fraction form
    13,224.61/18,248.61 = 7,919.29/x
  3. Step 3: Cross multiply
    13,224.61x = 18,248.61 × 7,919.29
  4. Step 4: Simplify right side
    13,224.61x = 144,516,034.69
  5. Step 5: Solve for x
    x = 144,516,034.69/13,224.61
  6. Step 6: Final answer
    x = 10,927.81

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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.