Home / 28,246.08-38,979.20-15,670.88

Finding the Fourth Proportional to 28,246.08, 38,979.20 and 15,670.88

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Solution

The fourth proportional to 28,246.08, 38,979.20 and 15,670.88 is: 21,625.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,246.08 : 38,979.20 = 15,670.88 : x
  2. Step 2: Convert to fraction form
    28,246.08/38,979.20 = 15,670.88/x
  3. Step 3: Cross multiply
    28,246.08x = 38,979.20 × 15,670.88
  4. Step 4: Simplify right side
    28,246.08x = 610,838,365.70
  5. Step 5: Solve for x
    x = 610,838,365.70/28,246.08
  6. Step 6: Final answer
    x = 21,625.60

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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.