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Finding the Fourth Proportional to 39,543, 54,570.66 and 21,637.62

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Solution

The fourth proportional to 39,543, 54,570.66 and 21,637.62 is: 29,860.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,543 : 54,570.66 = 21,637.62 : x
  2. Step 2: Convert to fraction form
    39,543/54,570.66 = 21,637.62/x
  3. Step 3: Cross multiply
    39,543x = 54,570.66 × 21,637.62
  4. Step 4: Simplify right side
    39,543x = 1,180,779,204.23
  5. Step 5: Solve for x
    x = 1,180,779,204.23/39,543
  6. Step 6: Final answer
    x = 29,860.64

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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.