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Finding the Fourth Proportional to 15,769.42, 21,761.88 and 8,695.84

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Solution

The fourth proportional to 15,769.42, 21,761.88 and 8,695.84 is: 12,000.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,769.42 : 21,761.88 = 8,695.84 : x
  2. Step 2: Convert to fraction form
    15,769.42/21,761.88 = 8,695.84/x
  3. Step 3: Cross multiply
    15,769.42x = 21,761.88 × 8,695.84
  4. Step 4: Simplify right side
    15,769.42x = 189,237,826.58
  5. Step 5: Solve for x
    x = 189,237,826.58/15,769.42
  6. Step 6: Final answer
    x = 12,000.30

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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.