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Finding the Fourth Proportional to 27,987.90, 42,030.45 and 14,865.90

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Solution

The fourth proportional to 27,987.90, 42,030.45 and 14,865.90 is: 22,324.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,987.90 : 42,030.45 = 14,865.90 : x
  2. Step 2: Convert to fraction form
    27,987.90/42,030.45 = 14,865.90/x
  3. Step 3: Cross multiply
    27,987.90x = 42,030.45 × 14,865.90
  4. Step 4: Simplify right side
    27,987.90x = 624,820,466.66
  5. Step 5: Solve for x
    x = 624,820,466.66/27,987.90
  6. Step 6: Final answer
    x = 22,324.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.