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Finding the Fourth Proportional to 18,744.60, 25,866.76 and 10,787.10

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Solution

The fourth proportional to 18,744.60, 25,866.76 and 10,787.10 is: 14,885.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,744.60 : 25,866.76 = 10,787.10 : x
  2. Step 2: Convert to fraction form
    18,744.60/25,866.76 = 10,787.10/x
  3. Step 3: Cross multiply
    18,744.60x = 25,866.76 × 10,787.10
  4. Step 4: Simplify right side
    18,744.60x = 279,027,326.80
  5. Step 5: Solve for x
    x = 279,027,326.80/18,744.60
  6. Step 6: Final answer
    x = 14,885.74

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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.