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Finding the Fourth Proportional to 18,672.61, 25,767 and 11,119.50

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Solution

The fourth proportional to 18,672.61, 25,767 and 11,119.50 is: 15,344.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.61 : 25,767 = 11,119.50 : x
  2. Step 2: Convert to fraction form
    18,672.61/25,767 = 11,119.50/x
  3. Step 3: Cross multiply
    18,672.61x = 25,767 × 11,119.50
  4. Step 4: Simplify right side
    18,672.61x = 286,516,156.50
  5. Step 5: Solve for x
    x = 286,516,156.50/18,672.61
  6. Step 6: Final answer
    x = 15,344.19

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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.