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Finding the Fourth Proportional to 39,551.80, 54,581.51 and 21,646.80

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Solution

The fourth proportional to 39,551.80, 54,581.51 and 21,646.80 is: 29,872.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,551.80 : 54,581.51 = 21,646.80 : x
  2. Step 2: Convert to fraction form
    39,551.80/54,581.51 = 21,646.80/x
  3. Step 3: Cross multiply
    39,551.80x = 54,581.51 × 21,646.80
  4. Step 4: Simplify right side
    39,551.80x = 1,181,515,030.67
  5. Step 5: Solve for x
    x = 1,181,515,030.67/39,551.80
  6. Step 6: Final answer
    x = 29,872.60

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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.