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Finding the Fourth Proportional to 39,421.80, 54,399.80 and 22,423.68

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Solution

The fourth proportional to 39,421.80, 54,399.80 and 22,423.68 is: 30,943.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,421.80 : 54,399.80 = 22,423.68 : x
  2. Step 2: Convert to fraction form
    39,421.80/54,399.80 = 22,423.68/x
  3. Step 3: Cross multiply
    39,421.80x = 54,399.80 × 22,423.68
  4. Step 4: Simplify right side
    39,421.80x = 1,219,843,763.32
  5. Step 5: Solve for x
    x = 1,219,843,763.32/39,421.80
  6. Step 6: Final answer
    x = 30,943.38

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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.