Home / 28,245.72-38,979.46-15,498.10

Finding the Fourth Proportional to 28,245.72, 38,979.46 and 15,498.10

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Solution

The fourth proportional to 28,245.72, 38,979.46 and 15,498.10 is: 21,387.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,245.72 : 38,979.46 = 15,498.10 : x
  2. Step 2: Convert to fraction form
    28,245.72/38,979.46 = 15,498.10/x
  3. Step 3: Cross multiply
    28,245.72x = 38,979.46 × 15,498.10
  4. Step 4: Simplify right side
    28,245.72x = 604,107,569.03
  5. Step 5: Solve for x
    x = 604,107,569.03/28,245.72
  6. Step 6: Final answer
    x = 21,387.58

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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.