Home / 28,165.83-38,868.71-15,420.17

Finding the Fourth Proportional to 28,165.83, 38,868.71 and 15,420.17

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Solution

The fourth proportional to 28,165.83, 38,868.71 and 15,420.17 is: 21,279.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,165.83 : 38,868.71 = 15,420.17 : x
  2. Step 2: Convert to fraction form
    28,165.83/38,868.71 = 15,420.17/x
  3. Step 3: Cross multiply
    28,165.83x = 38,868.71 × 15,420.17
  4. Step 4: Simplify right side
    28,165.83x = 599,361,844.44
  5. Step 5: Solve for x
    x = 599,361,844.44/28,165.83
  6. Step 6: Final answer
    x = 21,279.75

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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.