Home / 39,808.89-54,934.20-21,905.55

Finding the Fourth Proportional to 39,808.89, 54,934.20 and 21,905.55

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Solution

The fourth proportional to 39,808.89, 54,934.20 and 21,905.55 is: 30,228.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,808.89 : 54,934.20 = 21,905.55 : x
  2. Step 2: Convert to fraction form
    39,808.89/54,934.20 = 21,905.55/x
  3. Step 3: Cross multiply
    39,808.89x = 54,934.20 × 21,905.55
  4. Step 4: Simplify right side
    39,808.89x = 1,203,363,864.81
  5. Step 5: Solve for x
    x = 1,203,363,864.81/39,808.89
  6. Step 6: Final answer
    x = 30,228.52

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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.