Home / 39,685.38-54,767.40-21,781.02

Finding the Fourth Proportional to 39,685.38, 54,767.40 and 21,781.02

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Solution

The fourth proportional to 39,685.38, 54,767.40 and 21,781.02 is: 30,058.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,685.38 : 54,767.40 = 21,781.02 : x
  2. Step 2: Convert to fraction form
    39,685.38/54,767.40 = 21,781.02/x
  3. Step 3: Cross multiply
    39,685.38x = 54,767.40 × 21,781.02
  4. Step 4: Simplify right side
    39,685.38x = 1,192,889,834.75
  5. Step 5: Solve for x
    x = 1,192,889,834.75/39,685.38
  6. Step 6: Final answer
    x = 30,058.67

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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.