Home / 21,431.40-32,223.90-18,052.20

Finding the Fourth Proportional to 21,431.40, 32,223.90 and 18,052.20

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Solution

The fourth proportional to 21,431.40, 32,223.90 and 18,052.20 is: 27,142.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.40 : 32,223.90 = 18,052.20 : x
  2. Step 2: Convert to fraction form
    21,431.40/32,223.90 = 18,052.20/x
  3. Step 3: Cross multiply
    21,431.40x = 32,223.90 × 18,052.20
  4. Step 4: Simplify right side
    21,431.40x = 581,712,287.58
  5. Step 5: Solve for x
    x = 581,712,287.58/21,431.40
  6. Step 6: Final answer
    x = 27,142.99

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1.5x scale

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.