Home / 20,956.64-28,920.14-11,525.18

Finding the Fourth Proportional to 20,956.64, 28,920.14 and 11,525.18

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Solution

The fourth proportional to 20,956.64, 28,920.14 and 11,525.18 is: 15,904.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.64 : 28,920.14 = 11,525.18 : x
  2. Step 2: Convert to fraction form
    20,956.64/28,920.14 = 11,525.18/x
  3. Step 3: Cross multiply
    20,956.64x = 28,920.14 × 11,525.18
  4. Step 4: Simplify right side
    20,956.64x = 333,309,819.13
  5. Step 5: Solve for x
    x = 333,309,819.13/20,956.64
  6. Step 6: Final answer
    x = 15,904.74

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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.