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Finding the Fourth Proportional to 15,765.12, 21,755.58 and 8,595.10

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Solution

The fourth proportional to 15,765.12, 21,755.58 and 8,595.10 is: 11,861.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.12 : 21,755.58 = 8,595.10 : x
  2. Step 2: Convert to fraction form
    15,765.12/21,755.58 = 8,595.10/x
  3. Step 3: Cross multiply
    15,765.12x = 21,755.58 × 8,595.10
  4. Step 4: Simplify right side
    15,765.12x = 186,991,385.66
  5. Step 5: Solve for x
    x = 186,991,385.66/15,765.12
  6. Step 6: Final answer
    x = 11,861.08

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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.