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Finding the Fourth Proportional to 27,354.90, 37,780.90 and 18,386.83

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Solution

The fourth proportional to 27,354.90, 37,780.90 and 18,386.83 is: 25,394.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,354.90 : 37,780.90 = 18,386.83 : x
  2. Step 2: Convert to fraction form
    27,354.90/37,780.90 = 18,386.83/x
  3. Step 3: Cross multiply
    27,354.90x = 37,780.90 × 18,386.83
  4. Step 4: Simplify right side
    27,354.90x = 694,671,109.12
  5. Step 5: Solve for x
    x = 694,671,109.12/27,354.90
  6. Step 6: Final answer
    x = 25,394.76

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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.