Home / 20,952-28,913.76-12,571.20

Finding the Fourth Proportional to 20,952, 28,913.76 and 12,571.20

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Solution

The fourth proportional to 20,952, 28,913.76 and 12,571.20 is: 17,348.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952 : 28,913.76 = 12,571.20 : x
  2. Step 2: Convert to fraction form
    20,952/28,913.76 = 12,571.20/x
  3. Step 3: Cross multiply
    20,952x = 28,913.76 × 12,571.20
  4. Step 4: Simplify right side
    20,952x = 363,480,659.71
  5. Step 5: Solve for x
    x = 363,480,659.71/20,952
  6. Step 6: Final answer
    x = 17,348.26

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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.