Home / 39,985.78-55,180.12-22,080.62

Finding the Fourth Proportional to 39,985.78, 55,180.12 and 22,080.62

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Solution

The fourth proportional to 39,985.78, 55,180.12 and 22,080.62 is: 30,471.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,985.78 : 55,180.12 = 22,080.62 : x
  2. Step 2: Convert to fraction form
    39,985.78/55,180.12 = 22,080.62/x
  3. Step 3: Cross multiply
    39,985.78x = 55,180.12 × 22,080.62
  4. Step 4: Simplify right side
    39,985.78x = 1,218,411,261.27
  5. Step 5: Solve for x
    x = 1,218,411,261.27/39,985.78
  6. Step 6: Final answer
    x = 30,471.11

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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.