Home / 21,308.32-31,967.10-8,160.70

Finding the Fourth Proportional to 21,308.32, 31,967.10 and 8,160.70

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Solution

The fourth proportional to 21,308.32, 31,967.10 and 8,160.70 is: 12,242.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.32 : 31,967.10 = 8,160.70 : x
  2. Step 2: Convert to fraction form
    21,308.32/31,967.10 = 8,160.70/x
  3. Step 3: Cross multiply
    21,308.32x = 31,967.10 × 8,160.70
  4. Step 4: Simplify right side
    21,308.32x = 260,873,712.33
  5. Step 5: Solve for x
    x = 260,873,712.33/21,308.32
  6. Step 6: Final answer
    x = 12,242.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.