Home / 21,229.40-31,805.70-17,312.60

Finding the Fourth Proportional to 21,229.40, 31,805.70 and 17,312.60

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Solution

The fourth proportional to 21,229.40, 31,805.70 and 17,312.60 is: 25,937.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.40 : 31,805.70 = 17,312.60 : x
  2. Step 2: Convert to fraction form
    21,229.40/31,805.70 = 17,312.60/x
  3. Step 3: Cross multiply
    21,229.40x = 31,805.70 × 17,312.60
  4. Step 4: Simplify right side
    21,229.40x = 550,639,361.82
  5. Step 5: Solve for x
    x = 550,639,361.82/21,229.40
  6. Step 6: Final answer
    x = 25,937.58

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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.