Home / 13,639.69-20,438.65-9,180.87

Finding the Fourth Proportional to 13,639.69, 20,438.65 and 9,180.87

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Solution

The fourth proportional to 13,639.69, 20,438.65 and 9,180.87 is: 13,757.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.69 : 20,438.65 = 9,180.87 : x
  2. Step 2: Convert to fraction form
    13,639.69/20,438.65 = 9,180.87/x
  3. Step 3: Cross multiply
    13,639.69x = 20,438.65 × 9,180.87
  4. Step 4: Simplify right side
    13,639.69x = 187,644,471.81
  5. Step 5: Solve for x
    x = 187,644,471.81/13,639.69
  6. Step 6: Final answer
    x = 13,757.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.