Home / 38,513.90-53,147.28-21,514.78

Finding the Fourth Proportional to 38,513.90, 53,147.28 and 21,514.78

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Solution

The fourth proportional to 38,513.90, 53,147.28 and 21,514.78 is: 29,689.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,513.90 : 53,147.28 = 21,514.78 : x
  2. Step 2: Convert to fraction form
    38,513.90/53,147.28 = 21,514.78/x
  3. Step 3: Cross multiply
    38,513.90x = 53,147.28 × 21,514.78
  4. Step 4: Simplify right side
    38,513.90x = 1,143,452,036.80
  5. Step 5: Solve for x
    x = 1,143,452,036.80/38,513.90
  6. Step 6: Final answer
    x = 29,689.33

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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.