Home / 20,904.47-28,838.76-12,406.95

Finding the Fourth Proportional to 20,904.47, 28,838.76 and 12,406.95

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Solution

The fourth proportional to 20,904.47, 28,838.76 and 12,406.95 is: 17,116.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904.47 : 28,838.76 = 12,406.95 : x
  2. Step 2: Convert to fraction form
    20,904.47/28,838.76 = 12,406.95/x
  3. Step 3: Cross multiply
    20,904.47x = 28,838.76 × 12,406.95
  4. Step 4: Simplify right side
    20,904.47x = 357,801,103.88
  5. Step 5: Solve for x
    x = 357,801,103.88/20,904.47
  6. Step 6: Final answer
    x = 17,116.01

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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.