Home / 21,204.90-31,807.35-13,817.70

Finding the Fourth Proportional to 21,204.90, 31,807.35 and 13,817.70

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Solution

The fourth proportional to 21,204.90, 31,807.35 and 13,817.70 is: 20,726.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,204.90 : 31,807.35 = 13,817.70 : x
  2. Step 2: Convert to fraction form
    21,204.90/31,807.35 = 13,817.70/x
  3. Step 3: Cross multiply
    21,204.90x = 31,807.35 × 13,817.70
  4. Step 4: Simplify right side
    21,204.90x = 439,504,420.10
  5. Step 5: Solve for x
    x = 439,504,420.10/21,204.90
  6. Step 6: Final answer
    x = 20,726.55

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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.