Home / 20,364.45-28,141.54-15,319.91

Finding the Fourth Proportional to 20,364.45, 28,141.54 and 15,319.91

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Solution

The fourth proportional to 20,364.45, 28,141.54 and 15,319.91 is: 21,170.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,364.45 : 28,141.54 = 15,319.91 : x
  2. Step 2: Convert to fraction form
    20,364.45/28,141.54 = 15,319.91/x
  3. Step 3: Cross multiply
    20,364.45x = 28,141.54 × 15,319.91
  4. Step 4: Simplify right side
    20,364.45x = 431,125,860.06
  5. Step 5: Solve for x
    x = 431,125,860.06/20,364.45
  6. Step 6: Final answer
    x = 21,170.51

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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.