Home / 21,842.30-30,143.46-12,285.20

Finding the Fourth Proportional to 21,842.30, 30,143.46 and 12,285.20

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Solution

The fourth proportional to 21,842.30, 30,143.46 and 12,285.20 is: 16,954.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,842.30 : 30,143.46 = 12,285.20 : x
  2. Step 2: Convert to fraction form
    21,842.30/30,143.46 = 12,285.20/x
  3. Step 3: Cross multiply
    21,842.30x = 30,143.46 × 12,285.20
  4. Step 4: Simplify right side
    21,842.30x = 370,318,434.79
  5. Step 5: Solve for x
    x = 370,318,434.79/21,842.30
  6. Step 6: Final answer
    x = 16,954.19

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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.