Home / 13,731.28-18,949.18-7,443.65

Finding the Fourth Proportional to 13,731.28, 18,949.18 and 7,443.65

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Solution

The fourth proportional to 13,731.28, 18,949.18 and 7,443.65 is: 10,272.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.28 : 18,949.18 = 7,443.65 : x
  2. Step 2: Convert to fraction form
    13,731.28/18,949.18 = 7,443.65/x
  3. Step 3: Cross multiply
    13,731.28x = 18,949.18 × 7,443.65
  4. Step 4: Simplify right side
    13,731.28x = 141,051,063.71
  5. Step 5: Solve for x
    x = 141,051,063.71/13,731.28
  6. Step 6: Final answer
    x = 10,272.25

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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.