Home / 21,911.28-32,863.84-7,120.40

Finding the Fourth Proportional to 21,911.28, 32,863.84 and 7,120.40

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Solution

The fourth proportional to 21,911.28, 32,863.84 and 7,120.40 is: 10,679.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.28 : 32,863.84 = 7,120.40 : x
  2. Step 2: Convert to fraction form
    21,911.28/32,863.84 = 7,120.40/x
  3. Step 3: Cross multiply
    21,911.28x = 32,863.84 × 7,120.40
  4. Step 4: Simplify right side
    21,911.28x = 234,003,686.34
  5. Step 5: Solve for x
    x = 234,003,686.34/21,911.28
  6. Step 6: Final answer
    x = 10,679.60

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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.