Home / 20,393.28-28,130.80-12,827.68

Finding the Fourth Proportional to 20,393.28, 28,130.80 and 12,827.68

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Solution

The fourth proportional to 20,393.28, 28,130.80 and 12,827.68 is: 17,694.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.28 : 28,130.80 = 12,827.68 : x
  2. Step 2: Convert to fraction form
    20,393.28/28,130.80 = 12,827.68/x
  3. Step 3: Cross multiply
    20,393.28x = 28,130.80 × 12,827.68
  4. Step 4: Simplify right side
    20,393.28x = 360,852,900.54
  5. Step 5: Solve for x
    x = 360,852,900.54/20,393.28
  6. Step 6: Final answer
    x = 17,694.70

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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.