Home / 39,143.53-54,017.58-21,238.40

Finding the Fourth Proportional to 39,143.53, 54,017.58 and 21,238.40

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Solution

The fourth proportional to 39,143.53, 54,017.58 and 21,238.40 is: 29,308.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,143.53 : 54,017.58 = 21,238.40 : x
  2. Step 2: Convert to fraction form
    39,143.53/54,017.58 = 21,238.40/x
  3. Step 3: Cross multiply
    39,143.53x = 54,017.58 × 21,238.40
  4. Step 4: Simplify right side
    39,143.53x = 1,147,246,971.07
  5. Step 5: Solve for x
    x = 1,147,246,971.07/39,143.53
  6. Step 6: Final answer
    x = 29,308.73

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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.