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Finding the Fourth Proportional to 27,489.75, 37,932.63 and 15,390.90

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Solution

The fourth proportional to 27,489.75, 37,932.63 and 15,390.90 is: 21,237.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,489.75 : 37,932.63 = 15,390.90 : x
  2. Step 2: Convert to fraction form
    27,489.75/37,932.63 = 15,390.90/x
  3. Step 3: Cross multiply
    27,489.75x = 37,932.63 × 15,390.90
  4. Step 4: Simplify right side
    27,489.75x = 583,817,315.07
  5. Step 5: Solve for x
    x = 583,817,315.07/27,489.75
  6. Step 6: Final answer
    x = 21,237.64

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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.