Home / 18,868.12-28,275.36-13,898.68

Finding the Fourth Proportional to 18,868.12, 28,275.36 and 13,898.68

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Solution

The fourth proportional to 18,868.12, 28,275.36 and 13,898.68 is: 20,828.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.12 : 28,275.36 = 13,898.68 : x
  2. Step 2: Convert to fraction form
    18,868.12/28,275.36 = 13,898.68/x
  3. Step 3: Cross multiply
    18,868.12x = 28,275.36 × 13,898.68
  4. Step 4: Simplify right side
    18,868.12x = 392,990,180.52
  5. Step 5: Solve for x
    x = 392,990,180.52/18,868.12
  6. Step 6: Final answer
    x = 20,828.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.