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Finding the Fourth Proportional to 18,810.95, 25,959.11 and 10,427.45

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Solution

The fourth proportional to 18,810.95, 25,959.11 and 10,427.45 is: 14,389.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.95 : 25,959.11 = 10,427.45 : x
  2. Step 2: Convert to fraction form
    18,810.95/25,959.11 = 10,427.45/x
  3. Step 3: Cross multiply
    18,810.95x = 25,959.11 × 10,427.45
  4. Step 4: Simplify right side
    18,810.95x = 270,687,139.64
  5. Step 5: Solve for x
    x = 270,687,139.64/18,810.95
  6. Step 6: Final answer
    x = 14,389.87

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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.