Home / 28,018.30-38,665.27-15,918.80

Finding the Fourth Proportional to 28,018.30, 38,665.27 and 15,918.80

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Solution

The fourth proportional to 28,018.30, 38,665.27 and 15,918.80 is: 21,967.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,018.30 : 38,665.27 = 15,918.80 : x
  2. Step 2: Convert to fraction form
    28,018.30/38,665.27 = 15,918.80/x
  3. Step 3: Cross multiply
    28,018.30x = 38,665.27 × 15,918.80
  4. Step 4: Simplify right side
    28,018.30x = 615,504,700.08
  5. Step 5: Solve for x
    x = 615,504,700.08/28,018.30
  6. Step 6: Final answer
    x = 21,967.95

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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.