Home / 39,889.89-55,045.57-21,983.90

Finding the Fourth Proportional to 39,889.89, 55,045.57 and 21,983.90

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Solution

The fourth proportional to 39,889.89, 55,045.57 and 21,983.90 is: 30,336.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,889.89 : 55,045.57 = 21,983.90 : x
  2. Step 2: Convert to fraction form
    39,889.89/55,045.57 = 21,983.90/x
  3. Step 3: Cross multiply
    39,889.89x = 55,045.57 × 21,983.90
  4. Step 4: Simplify right side
    39,889.89x = 1,210,116,306.32
  5. Step 5: Solve for x
    x = 1,210,116,306.32/39,889.89
  6. Step 6: Final answer
    x = 30,336.42

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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.