Home / 39,879.60-55,034.04-21,973.74

Finding the Fourth Proportional to 39,879.60, 55,034.04 and 21,973.74

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Solution

The fourth proportional to 39,879.60, 55,034.04 and 21,973.74 is: 30,323.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,879.60 : 55,034.04 = 21,973.74 : x
  2. Step 2: Convert to fraction form
    39,879.60/55,034.04 = 21,973.74/x
  3. Step 3: Cross multiply
    39,879.60x = 55,034.04 × 21,973.74
  4. Step 4: Simplify right side
    39,879.60x = 1,209,303,686.11
  5. Step 5: Solve for x
    x = 1,209,303,686.11/39,879.60
  6. Step 6: Final answer
    x = 30,323.87

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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.