Home / 39,421.39-54,401.12-21,516.23

Finding the Fourth Proportional to 39,421.39, 54,401.12 and 21,516.23

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Solution

The fourth proportional to 39,421.39, 54,401.12 and 21,516.23 is: 29,692.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,421.39 : 54,401.12 = 21,516.23 : x
  2. Step 2: Convert to fraction form
    39,421.39/54,401.12 = 21,516.23/x
  3. Step 3: Cross multiply
    39,421.39x = 54,401.12 × 21,516.23
  4. Step 4: Simplify right side
    39,421.39x = 1,170,506,902.60
  5. Step 5: Solve for x
    x = 1,170,506,902.60/39,421.39
  6. Step 6: Final answer
    x = 29,692.18

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Half scale
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Double scale
Find fourth proportional to 39,422.39, 54,402.49 and 21,517.23
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.