Home / 20,489.45-28,275.13-11,536.93

Finding the Fourth Proportional to 20,489.45, 28,275.13 and 11,536.93

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Solution

The fourth proportional to 20,489.45, 28,275.13 and 11,536.93 is: 15,920.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.45 : 28,275.13 = 11,536.93 : x
  2. Step 2: Convert to fraction form
    20,489.45/28,275.13 = 11,536.93/x
  3. Step 3: Cross multiply
    20,489.45x = 28,275.13 × 11,536.93
  4. Step 4: Simplify right side
    20,489.45x = 326,208,096.02
  5. Step 5: Solve for x
    x = 326,208,096.02/20,489.45
  6. Step 6: Final answer
    x = 15,920.78

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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.