Home / 31,203.90-43,096.88-20,977.17

Finding the Fourth Proportional to 31,203.90, 43,096.88 and 20,977.17

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Solution

The fourth proportional to 31,203.90, 43,096.88 and 20,977.17 is: 28,972.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,203.90 : 43,096.88 = 20,977.17 : x
  2. Step 2: Convert to fraction form
    31,203.90/43,096.88 = 20,977.17/x
  3. Step 3: Cross multiply
    31,203.90x = 43,096.88 × 20,977.17
  4. Step 4: Simplify right side
    31,203.90x = 904,050,362.75
  5. Step 5: Solve for x
    x = 904,050,362.75/31,203.90
  6. Step 6: Final answer
    x = 28,972.36

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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.