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Finding the Fourth Proportional to 18,871.59, 26,038.49 and 10,912.40

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Solution

The fourth proportional to 18,871.59, 26,038.49 and 10,912.40 is: 15,056.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.59 : 26,038.49 = 10,912.40 : x
  2. Step 2: Convert to fraction form
    18,871.59/26,038.49 = 10,912.40/x
  3. Step 3: Cross multiply
    18,871.59x = 26,038.49 × 10,912.40
  4. Step 4: Simplify right side
    18,871.59x = 284,142,233.52
  5. Step 5: Solve for x
    x = 284,142,233.52/18,871.59
  6. Step 6: Final answer
    x = 15,056.61

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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.