Home / 38,780.75-53,511.60-21,781.74

Finding the Fourth Proportional to 38,780.75, 53,511.60 and 21,781.74

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Solution

The fourth proportional to 38,780.75, 53,511.60 and 21,781.74 is: 30,055.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,780.75 : 53,511.60 = 21,781.74 : x
  2. Step 2: Convert to fraction form
    38,780.75/53,511.60 = 21,781.74/x
  3. Step 3: Cross multiply
    38,780.75x = 53,511.60 × 21,781.74
  4. Step 4: Simplify right side
    38,780.75x = 1,165,575,639.20
  5. Step 5: Solve for x
    x = 1,165,575,639.20/38,780.75
  6. Step 6: Final answer
    x = 30,055.52

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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.