Home / 21,971.79-30,321.20-12,281.24

Finding the Fourth Proportional to 21,971.79, 30,321.20 and 12,281.24

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Solution

The fourth proportional to 21,971.79, 30,321.20 and 12,281.24 is: 16,948.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.79 : 30,321.20 = 12,281.24 : x
  2. Step 2: Convert to fraction form
    21,971.79/30,321.20 = 12,281.24/x
  3. Step 3: Cross multiply
    21,971.79x = 30,321.20 × 12,281.24
  4. Step 4: Simplify right side
    21,971.79x = 372,382,040.79
  5. Step 5: Solve for x
    x = 372,382,040.79/21,971.79
  6. Step 6: Final answer
    x = 16,948.19

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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.