Home / 39,685.07-54,766.73-21,781.07

Finding the Fourth Proportional to 39,685.07, 54,766.73 and 21,781.07

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Solution

The fourth proportional to 39,685.07, 54,766.73 and 21,781.07 is: 30,058.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,685.07 : 54,766.73 = 21,781.07 : x
  2. Step 2: Convert to fraction form
    39,685.07/54,766.73 = 21,781.07/x
  3. Step 3: Cross multiply
    39,685.07x = 54,766.73 × 21,781.07
  4. Step 4: Simplify right side
    39,685.07x = 1,192,877,597.06
  5. Step 5: Solve for x
    x = 1,192,877,597.06/39,685.07
  6. Step 6: Final answer
    x = 30,058.60

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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.