Home / 21,192.40-31,796.70-20,860.30

Finding the Fourth Proportional to 21,192.40, 31,796.70 and 20,860.30

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Solution

The fourth proportional to 21,192.40, 31,796.70 and 20,860.30 is: 31,298.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,192.40 : 31,796.70 = 20,860.30 : x
  2. Step 2: Convert to fraction form
    21,192.40/31,796.70 = 20,860.30/x
  3. Step 3: Cross multiply
    21,192.40x = 31,796.70 × 20,860.30
  4. Step 4: Simplify right side
    21,192.40x = 663,288,701.01
  5. Step 5: Solve for x
    x = 663,288,701.01/21,192.40
  6. Step 6: Final answer
    x = 31,298.42

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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.