Home / 39,255.12-54,172.32-21,350.32

Finding the Fourth Proportional to 39,255.12, 54,172.32 and 21,350.32

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Solution

The fourth proportional to 39,255.12, 54,172.32 and 21,350.32 is: 29,463.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,255.12 : 54,172.32 = 21,350.32 : x
  2. Step 2: Convert to fraction form
    39,255.12/54,172.32 = 21,350.32/x
  3. Step 3: Cross multiply
    39,255.12x = 54,172.32 × 21,350.32
  4. Step 4: Simplify right side
    39,255.12x = 1,156,596,367.14
  5. Step 5: Solve for x
    x = 1,156,596,367.14/39,255.12
  6. Step 6: Final answer
    x = 29,463.58

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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.