Home / 21,320.60-32,019.30-20,629.40

Finding the Fourth Proportional to 21,320.60, 32,019.30 and 20,629.40

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Solution

The fourth proportional to 21,320.60, 32,019.30 and 20,629.40 is: 30,981.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.60 : 32,019.30 = 20,629.40 : x
  2. Step 2: Convert to fraction form
    21,320.60/32,019.30 = 20,629.40/x
  3. Step 3: Cross multiply
    21,320.60x = 32,019.30 × 20,629.40
  4. Step 4: Simplify right side
    21,320.60x = 660,538,947.42
  5. Step 5: Solve for x
    x = 660,538,947.42/21,320.60
  6. Step 6: Final answer
    x = 30,981.26

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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.