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Finding the Fourth Proportional to 18,711.79, 25,822.29 and 10,328.29

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Solution

The fourth proportional to 18,711.79, 25,822.29 and 10,328.29 is: 14,253.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.79 : 25,822.29 = 10,328.29 : x
  2. Step 2: Convert to fraction form
    18,711.79/25,822.29 = 10,328.29/x
  3. Step 3: Cross multiply
    18,711.79x = 25,822.29 × 10,328.29
  4. Step 4: Simplify right side
    18,711.79x = 266,700,099.58
  5. Step 5: Solve for x
    x = 266,700,099.58/18,711.79
  6. Step 6: Final answer
    x = 14,253.05

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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.