Home / 20,458.16-28,222.73-13,287.57

Finding the Fourth Proportional to 20,458.16, 28,222.73 and 13,287.57

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Solution

The fourth proportional to 20,458.16, 28,222.73 and 13,287.57 is: 18,330.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,458.16 : 28,222.73 = 13,287.57 : x
  2. Step 2: Convert to fraction form
    20,458.16/28,222.73 = 13,287.57/x
  3. Step 3: Cross multiply
    20,458.16x = 28,222.73 × 13,287.57
  4. Step 4: Simplify right side
    20,458.16x = 375,011,292.91
  5. Step 5: Solve for x
    x = 375,011,292.91/20,458.16
  6. Step 6: Final answer
    x = 18,330.65

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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.