Home / 21,931.50-32,902.46-7,140.43

Finding the Fourth Proportional to 21,931.50, 32,902.46 and 7,140.43

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Solution

The fourth proportional to 21,931.50, 32,902.46 and 7,140.43 is: 10,712.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.50 : 32,902.46 = 7,140.43 : x
  2. Step 2: Convert to fraction form
    21,931.50/32,902.46 = 7,140.43/x
  3. Step 3: Cross multiply
    21,931.50x = 32,902.46 × 7,140.43
  4. Step 4: Simplify right side
    21,931.50x = 234,937,712.46
  5. Step 5: Solve for x
    x = 234,937,712.46/21,931.50
  6. Step 6: Final answer
    x = 10,712.34

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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.