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Finding the Fourth Proportional to 18,678.89, 25,774.80 and 11,124.17

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Solution

The fourth proportional to 18,678.89, 25,774.80 and 11,124.17 is: 15,350.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.89 : 25,774.80 = 11,124.17 : x
  2. Step 2: Convert to fraction form
    18,678.89/25,774.80 = 11,124.17/x
  3. Step 3: Cross multiply
    18,678.89x = 25,774.80 × 11,124.17
  4. Step 4: Simplify right side
    18,678.89x = 286,723,256.92
  5. Step 5: Solve for x
    x = 286,723,256.92/18,678.89
  6. Step 6: Final answer
    x = 15,350.12

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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.