Home / 39,897.04-55,055.41-21,992.20

Finding the Fourth Proportional to 39,897.04, 55,055.41 and 21,992.20

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Solution

The fourth proportional to 39,897.04, 55,055.41 and 21,992.20 is: 30,347.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,897.04 : 55,055.41 = 21,992.20 : x
  2. Step 2: Convert to fraction form
    39,897.04/55,055.41 = 21,992.20/x
  3. Step 3: Cross multiply
    39,897.04x = 55,055.41 × 21,992.20
  4. Step 4: Simplify right side
    39,897.04x = 1,210,789,587.80
  5. Step 5: Solve for x
    x = 1,210,789,587.80/39,897.04
  6. Step 6: Final answer
    x = 30,347.86

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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.