Home / 21,980.46-30,331.19-12,421.18

Finding the Fourth Proportional to 21,980.46, 30,331.19 and 12,421.18

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Solution

The fourth proportional to 21,980.46, 30,331.19 and 12,421.18 is: 17,140.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,980.46 : 30,331.19 = 12,421.18 : x
  2. Step 2: Convert to fraction form
    21,980.46/30,331.19 = 12,421.18/x
  3. Step 3: Cross multiply
    21,980.46x = 30,331.19 × 12,421.18
  4. Step 4: Simplify right side
    21,980.46x = 376,749,239.57
  5. Step 5: Solve for x
    x = 376,749,239.57/21,980.46
  6. Step 6: Final answer
    x = 17,140.19

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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.