Home / 13,417.81-20,134.90-8,480.65

Finding the Fourth Proportional to 13,417.81, 20,134.90 and 8,480.65

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Solution

The fourth proportional to 13,417.81, 20,134.90 and 8,480.65 is: 12,726.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,417.81 : 20,134.90 = 8,480.65 : x
  2. Step 2: Convert to fraction form
    13,417.81/20,134.90 = 8,480.65/x
  3. Step 3: Cross multiply
    13,417.81x = 20,134.90 × 8,480.65
  4. Step 4: Simplify right side
    13,417.81x = 170,756,939.01
  5. Step 5: Solve for x
    x = 170,756,939.01/13,417.81
  6. Step 6: Final answer
    x = 12,726.15

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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.