Home / 18,947.28-26,139.60-12,576.96

Finding the Fourth Proportional to 18,947.28, 26,139.60 and 12,576.96

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Solution

The fourth proportional to 18,947.28, 26,139.60 and 12,576.96 is: 17,351.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947.28 : 26,139.60 = 12,576.96 : x
  2. Step 2: Convert to fraction form
    18,947.28/26,139.60 = 12,576.96/x
  3. Step 3: Cross multiply
    18,947.28x = 26,139.60 × 12,576.96
  4. Step 4: Simplify right side
    18,947.28x = 328,756,703.62
  5. Step 5: Solve for x
    x = 328,756,703.62/18,947.28
  6. Step 6: Final answer
    x = 17,351.13

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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.