Home / 39,891.03-55,050-21,986.70

Finding the Fourth Proportional to 39,891.03, 55,050 and 21,986.70

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Solution

The fourth proportional to 39,891.03, 55,050 and 21,986.70 is: 30,341.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,891.03 : 55,050 = 21,986.70 : x
  2. Step 2: Convert to fraction form
    39,891.03/55,050 = 21,986.70/x
  3. Step 3: Cross multiply
    39,891.03x = 55,050 × 21,986.70
  4. Step 4: Simplify right side
    39,891.03x = 1,210,367,835
  5. Step 5: Solve for x
    x = 1,210,367,835/39,891.03
  6. Step 6: Final answer
    x = 30,341.85

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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.