Home / 39,881.28-55,036.80-21,976.04

Finding the Fourth Proportional to 39,881.28, 55,036.80 and 21,976.04

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Solution

The fourth proportional to 39,881.28, 55,036.80 and 21,976.04 is: 30,327.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,881.28 : 55,036.80 = 21,976.04 : x
  2. Step 2: Convert to fraction form
    39,881.28/55,036.80 = 21,976.04/x
  3. Step 3: Cross multiply
    39,881.28x = 55,036.80 × 21,976.04
  4. Step 4: Simplify right side
    39,881.28x = 1,209,490,918.27
  5. Step 5: Solve for x
    x = 1,209,490,918.27/39,881.28
  6. Step 6: Final answer
    x = 30,327.28

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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.