Home / 38,780.53-53,514.15-21,779.35

Finding the Fourth Proportional to 38,780.53, 53,514.15 and 21,779.35

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Solution

The fourth proportional to 38,780.53, 53,514.15 and 21,779.35 is: 30,053.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,780.53 : 53,514.15 = 21,779.35 : x
  2. Step 2: Convert to fraction form
    38,780.53/53,514.15 = 21,779.35/x
  3. Step 3: Cross multiply
    38,780.53x = 53,514.15 × 21,779.35
  4. Step 4: Simplify right side
    38,780.53x = 1,165,503,402.80
  5. Step 5: Solve for x
    x = 1,165,503,402.80/38,780.53
  6. Step 6: Final answer
    x = 30,053.83

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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.