Home / 38,279.70-52,828.80-21,287

Finding the Fourth Proportional to 38,279.70, 52,828.80 and 21,287

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Solution

The fourth proportional to 38,279.70, 52,828.80 and 21,287 is: 29,377.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,279.70 : 52,828.80 = 21,287 : x
  2. Step 2: Convert to fraction form
    38,279.70/52,828.80 = 21,287/x
  3. Step 3: Cross multiply
    38,279.70x = 52,828.80 × 21,287
  4. Step 4: Simplify right side
    38,279.70x = 1,124,566,665.60
  5. Step 5: Solve for x
    x = 1,124,566,665.60/38,279.70
  6. Step 6: Final answer
    x = 29,377.62

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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.