Home / 21,866.55-30,170.65-12,440.31

Finding the Fourth Proportional to 21,866.55, 30,170.65 and 12,440.31

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Solution

The fourth proportional to 21,866.55, 30,170.65 and 12,440.31 is: 17,164.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,866.55 : 30,170.65 = 12,440.31 : x
  2. Step 2: Convert to fraction form
    21,866.55/30,170.65 = 12,440.31/x
  3. Step 3: Cross multiply
    21,866.55x = 30,170.65 × 12,440.31
  4. Step 4: Simplify right side
    21,866.55x = 375,332,238.90
  5. Step 5: Solve for x
    x = 375,332,238.90/21,866.55
  6. Step 6: Final answer
    x = 17,164.68

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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.