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Finding the Fourth Proportional to 20,959.75, 28,925.06 and 11,528.92

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Solution

The fourth proportional to 20,959.75, 28,925.06 and 11,528.92 is: 15,910.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.75 : 28,925.06 = 11,528.92 : x
  2. Step 2: Convert to fraction form
    20,959.75/28,925.06 = 11,528.92/x
  3. Step 3: Cross multiply
    20,959.75x = 28,925.06 × 11,528.92
  4. Step 4: Simplify right side
    20,959.75x = 333,474,702.74
  5. Step 5: Solve for x
    x = 333,474,702.74/20,959.75
  6. Step 6: Final answer
    x = 15,910.24

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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.