Home / 39,315.26-54,308.14-31,412.90

Finding the Fourth Proportional to 39,315.26, 54,308.14 and 31,412.90

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Solution

The fourth proportional to 39,315.26, 54,308.14 and 31,412.90 is: 43,392.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,315.26 : 54,308.14 = 31,412.90 : x
  2. Step 2: Convert to fraction form
    39,315.26/54,308.14 = 31,412.90/x
  3. Step 3: Cross multiply
    39,315.26x = 54,308.14 × 31,412.90
  4. Step 4: Simplify right side
    39,315.26x = 1,705,976,171.01
  5. Step 5: Solve for x
    x = 1,705,976,171.01/39,315.26
  6. Step 6: Final answer
    x = 43,392.21

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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.