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Finding the Fourth Proportional to 27,615.95, 38,108.86 and 15,679.95

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Solution

The fourth proportional to 27,615.95, 38,108.86 and 15,679.95 is: 21,637.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,615.95 : 38,108.86 = 15,679.95 : x
  2. Step 2: Convert to fraction form
    27,615.95/38,108.86 = 15,679.95/x
  3. Step 3: Cross multiply
    27,615.95x = 38,108.86 × 15,679.95
  4. Step 4: Simplify right side
    27,615.95x = 597,545,019.36
  5. Step 5: Solve for x
    x = 597,545,019.36/27,615.95
  6. Step 6: Final answer
    x = 21,637.68

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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.