Home / 39,189.12-54,080.52-21,284.40

Finding the Fourth Proportional to 39,189.12, 54,080.52 and 21,284.40

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Solution

The fourth proportional to 39,189.12, 54,080.52 and 21,284.40 is: 29,372.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,189.12 : 54,080.52 = 21,284.40 : x
  2. Step 2: Convert to fraction form
    39,189.12/54,080.52 = 21,284.40/x
  3. Step 3: Cross multiply
    39,189.12x = 54,080.52 × 21,284.40
  4. Step 4: Simplify right side
    39,189.12x = 1,151,071,419.89
  5. Step 5: Solve for x
    x = 1,151,071,419.89/39,189.12
  6. Step 6: Final answer
    x = 29,372.22

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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.