Home / 21,364.80-32,047.20-20,155.20

Finding the Fourth Proportional to 21,364.80, 32,047.20 and 20,155.20

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Solution

The fourth proportional to 21,364.80, 32,047.20 and 20,155.20 is: 30,232.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,364.80 : 32,047.20 = 20,155.20 : x
  2. Step 2: Convert to fraction form
    21,364.80/32,047.20 = 20,155.20/x
  3. Step 3: Cross multiply
    21,364.80x = 32,047.20 × 20,155.20
  4. Step 4: Simplify right side
    21,364.80x = 645,917,725.44
  5. Step 5: Solve for x
    x = 645,917,725.44/21,364.80
  6. Step 6: Final answer
    x = 30,232.80

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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.