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Finding the Fourth Proportional to 28,061.82, 38,726.91 and 16,728.30

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Solution

The fourth proportional to 28,061.82, 38,726.91 and 16,728.30 is: 23,086.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,061.82 : 38,726.91 = 16,728.30 : x
  2. Step 2: Convert to fraction form
    28,061.82/38,726.91 = 16,728.30/x
  3. Step 3: Cross multiply
    28,061.82x = 38,726.91 × 16,728.30
  4. Step 4: Simplify right side
    28,061.82x = 647,835,368.55
  5. Step 5: Solve for x
    x = 647,835,368.55/28,061.82
  6. Step 6: Final answer
    x = 23,086.01

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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.