Home / 21,918.40-32,834.40-20,363.20

Finding the Fourth Proportional to 21,918.40, 32,834.40 and 20,363.20

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Solution

The fourth proportional to 21,918.40, 32,834.40 and 20,363.20 is: 30,504.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.40 : 32,834.40 = 20,363.20 : x
  2. Step 2: Convert to fraction form
    21,918.40/32,834.40 = 20,363.20/x
  3. Step 3: Cross multiply
    21,918.40x = 32,834.40 × 20,363.20
  4. Step 4: Simplify right side
    21,918.40x = 668,613,454.08
  5. Step 5: Solve for x
    x = 668,613,454.08/21,918.40
  6. Step 6: Final answer
    x = 30,504.67

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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.