Home / 20,904.38-28,846.13-12,405.04

Finding the Fourth Proportional to 20,904.38, 28,846.13 and 12,405.04

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Solution

The fourth proportional to 20,904.38, 28,846.13 and 12,405.04 is: 17,117.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904.38 : 28,846.13 = 12,405.04 : x
  2. Step 2: Convert to fraction form
    20,904.38/28,846.13 = 12,405.04/x
  3. Step 3: Cross multiply
    20,904.38x = 28,846.13 × 12,405.04
  4. Step 4: Simplify right side
    20,904.38x = 357,837,370.53
  5. Step 5: Solve for x
    x = 357,837,370.53/20,904.38
  6. Step 6: Final answer
    x = 17,117.82

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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.