Home / 39,195.36-54,090.20-21,290.40

Finding the Fourth Proportional to 39,195.36, 54,090.20 and 21,290.40

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Solution

The fourth proportional to 39,195.36, 54,090.20 and 21,290.40 is: 29,381.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,195.36 : 54,090.20 = 21,290.40 : x
  2. Step 2: Convert to fraction form
    39,195.36/54,090.20 = 21,290.40/x
  3. Step 3: Cross multiply
    39,195.36x = 54,090.20 × 21,290.40
  4. Step 4: Simplify right side
    39,195.36x = 1,151,601,994.08
  5. Step 5: Solve for x
    x = 1,151,601,994.08/39,195.36
  6. Step 6: Final answer
    x = 29,381.08

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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.