Home / 21,426.40-32,139.60-18,834.40

Finding the Fourth Proportional to 21,426.40, 32,139.60 and 18,834.40

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Solution

The fourth proportional to 21,426.40, 32,139.60 and 18,834.40 is: 28,251.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,426.40 : 32,139.60 = 18,834.40 : x
  2. Step 2: Convert to fraction form
    21,426.40/32,139.60 = 18,834.40/x
  3. Step 3: Cross multiply
    21,426.40x = 32,139.60 × 18,834.40
  4. Step 4: Simplify right side
    21,426.40x = 605,330,082.24
  5. Step 5: Solve for x
    x = 605,330,082.24/21,426.40
  6. Step 6: Final answer
    x = 28,251.60

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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.