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Finding the Fourth Proportional to 27,643.46, 38,148.79 and 16,890.11

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Solution

The fourth proportional to 27,643.46, 38,148.79 and 16,890.11 is: 23,308.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,643.46 : 38,148.79 = 16,890.11 : x
  2. Step 2: Convert to fraction form
    27,643.46/38,148.79 = 16,890.11/x
  3. Step 3: Cross multiply
    27,643.46x = 38,148.79 × 16,890.11
  4. Step 4: Simplify right side
    27,643.46x = 644,337,259.47
  5. Step 5: Solve for x
    x = 644,337,259.47/27,643.46
  6. Step 6: Final answer
    x = 23,308.85

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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.