Home / 21,904.16-30,209.11-18,517.68

Finding the Fourth Proportional to 21,904.16, 30,209.11 and 18,517.68

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Solution

The fourth proportional to 21,904.16, 30,209.11 and 18,517.68 is: 25,538.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.16 : 30,209.11 = 18,517.68 : x
  2. Step 2: Convert to fraction form
    21,904.16/30,209.11 = 18,517.68/x
  3. Step 3: Cross multiply
    21,904.16x = 30,209.11 × 18,517.68
  4. Step 4: Simplify right side
    21,904.16x = 559,402,585.77
  5. Step 5: Solve for x
    x = 559,402,585.77/21,904.16
  6. Step 6: Final answer
    x = 25,538.65

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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.