Home / 84,020.86-126,031.32-21,686.50

Finding the Fourth Proportional to 84,020.86, 126,031.32 and 21,686.50

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Solution

The fourth proportional to 84,020.86, 126,031.32 and 21,686.50 is: 32,529.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,020.86 : 126,031.32 = 21,686.50 : x
  2. Step 2: Convert to fraction form
    84,020.86/126,031.32 = 21,686.50/x
  3. Step 3: Cross multiply
    84,020.86x = 126,031.32 × 21,686.50
  4. Step 4: Simplify right side
    84,020.86x = 2,733,178,221.18
  5. Step 5: Solve for x
    x = 2,733,178,221.18/84,020.86
  6. Step 6: Final answer
    x = 32,529.76

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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.