Home / 20,475.14-28,259.56-12,821.97

Finding the Fourth Proportional to 20,475.14, 28,259.56 and 12,821.97

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Solution

The fourth proportional to 20,475.14, 28,259.56 and 12,821.97 is: 17,696.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,475.14 : 28,259.56 = 12,821.97 : x
  2. Step 2: Convert to fraction form
    20,475.14/28,259.56 = 12,821.97/x
  3. Step 3: Cross multiply
    20,475.14x = 28,259.56 × 12,821.97
  4. Step 4: Simplify right side
    20,475.14x = 362,343,230.53
  5. Step 5: Solve for x
    x = 362,343,230.53/20,475.14
  6. Step 6: Final answer
    x = 17,696.74

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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.