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Finding the Fourth Proportional to 18,773.35, 25,889.66 and 12,724.47

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Solution

The fourth proportional to 18,773.35, 25,889.66 and 12,724.47 is: 17,547.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,773.35 : 25,889.66 = 12,724.47 : x
  2. Step 2: Convert to fraction form
    18,773.35/25,889.66 = 12,724.47/x
  3. Step 3: Cross multiply
    18,773.35x = 25,889.66 × 12,724.47
  4. Step 4: Simplify right side
    18,773.35x = 329,432,186.07
  5. Step 5: Solve for x
    x = 329,432,186.07/18,773.35
  6. Step 6: Final answer
    x = 17,547.87

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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.