Home / 20,351.76-28,087.92-12,395.14

Finding the Fourth Proportional to 20,351.76, 28,087.92 and 12,395.14

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Solution

The fourth proportional to 20,351.76, 28,087.92 and 12,395.14 is: 17,106.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.76 : 28,087.92 = 12,395.14 : x
  2. Step 2: Convert to fraction form
    20,351.76/28,087.92 = 12,395.14/x
  3. Step 3: Cross multiply
    20,351.76x = 28,087.92 × 12,395.14
  4. Step 4: Simplify right side
    20,351.76x = 348,153,700.71
  5. Step 5: Solve for x
    x = 348,153,700.71/20,351.76
  6. Step 6: Final answer
    x = 17,106.81

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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.