Home / 39,780.81-54,898.93-21,877.18

Finding the Fourth Proportional to 39,780.81, 54,898.93 and 21,877.18

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Solution

The fourth proportional to 39,780.81, 54,898.93 and 21,877.18 is: 30,191.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.81 : 54,898.93 = 21,877.18 : x
  2. Step 2: Convert to fraction form
    39,780.81/54,898.93 = 21,877.18/x
  3. Step 3: Cross multiply
    39,780.81x = 54,898.93 × 21,877.18
  4. Step 4: Simplify right side
    39,780.81x = 1,201,033,773.42
  5. Step 5: Solve for x
    x = 1,201,033,773.42/39,780.81
  6. Step 6: Final answer
    x = 30,191.29

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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.