Home / 15,765.24-21,756.08-8,691.64

Finding the Fourth Proportional to 15,765.24, 21,756.08 and 8,691.64

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Solution

The fourth proportional to 15,765.24, 21,756.08 and 8,691.64 is: 11,994.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.24 : 21,756.08 = 8,691.64 : x
  2. Step 2: Convert to fraction form
    15,765.24/21,756.08 = 8,691.64/x
  3. Step 3: Cross multiply
    15,765.24x = 21,756.08 × 8,691.64
  4. Step 4: Simplify right side
    15,765.24x = 189,096,015.17
  5. Step 5: Solve for x
    x = 189,096,015.17/15,765.24
  6. Step 6: Final answer
    x = 11,994.49

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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.