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Finding the Fourth Proportional to 39,772.71, 54,886.71 and 21,867.85

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Solution

The fourth proportional to 39,772.71, 54,886.71 and 21,867.85 is: 30,177.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,772.71 : 54,886.71 = 21,867.85 : x
  2. Step 2: Convert to fraction form
    39,772.71/54,886.71 = 21,867.85/x
  3. Step 3: Cross multiply
    39,772.71x = 54,886.71 × 21,867.85
  4. Step 4: Simplify right side
    39,772.71x = 1,200,254,341.27
  5. Step 5: Solve for x
    x = 1,200,254,341.27/39,772.71
  6. Step 6: Final answer
    x = 30,177.84

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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.