Home / 39,878.28-55,032.68-21,973.04

Finding the Fourth Proportional to 39,878.28, 55,032.68 and 21,973.04

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Solution

The fourth proportional to 39,878.28, 55,032.68 and 21,973.04 is: 30,323.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,878.28 : 55,032.68 = 21,973.04 : x
  2. Step 2: Convert to fraction form
    39,878.28/55,032.68 = 21,973.04/x
  3. Step 3: Cross multiply
    39,878.28x = 55,032.68 × 21,973.04
  4. Step 4: Simplify right side
    39,878.28x = 1,209,235,278.95
  5. Step 5: Solve for x
    x = 1,209,235,278.95/39,878.28
  6. Step 6: Final answer
    x = 30,323.16

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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.