Home / 28,245.76-38,979.54-15,498.74

Finding the Fourth Proportional to 28,245.76, 38,979.54 and 15,498.74

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Solution

The fourth proportional to 28,245.76, 38,979.54 and 15,498.74 is: 21,388.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,245.76 : 38,979.54 = 15,498.74 : x
  2. Step 2: Convert to fraction form
    28,245.76/38,979.54 = 15,498.74/x
  3. Step 3: Cross multiply
    28,245.76x = 38,979.54 × 15,498.74
  4. Step 4: Simplify right side
    28,245.76x = 604,133,853.23
  5. Step 5: Solve for x
    x = 604,133,853.23/28,245.76
  6. Step 6: Final answer
    x = 21,388.48

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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.