Home / 18,478.74-25,491.96-13,440.78

Finding the Fourth Proportional to 18,478.74, 25,491.96 and 13,440.78

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Solution

The fourth proportional to 18,478.74, 25,491.96 and 13,440.78 is: 18,541.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.74 : 25,491.96 = 13,440.78 : x
  2. Step 2: Convert to fraction form
    18,478.74/25,491.96 = 13,440.78/x
  3. Step 3: Cross multiply
    18,478.74x = 25,491.96 × 13,440.78
  4. Step 4: Simplify right side
    18,478.74x = 342,631,826.13
  5. Step 5: Solve for x
    x = 342,631,826.13/18,478.74
  6. Step 6: Final answer
    x = 18,541.95

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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.