Home / 15,311.76-21,129.96-8,597.44

Finding the Fourth Proportional to 15,311.76, 21,129.96 and 8,597.44

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Solution

The fourth proportional to 15,311.76, 21,129.96 and 8,597.44 is: 11,864.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.76 : 21,129.96 = 8,597.44 : x
  2. Step 2: Convert to fraction form
    15,311.76/21,129.96 = 8,597.44/x
  3. Step 3: Cross multiply
    15,311.76x = 21,129.96 × 8,597.44
  4. Step 4: Simplify right side
    15,311.76x = 181,663,563.30
  5. Step 5: Solve for x
    x = 181,663,563.30/15,311.76
  6. Step 6: Final answer
    x = 11,864.32

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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.