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Finding the Fourth Proportional to 39,307.25, 54,243.74 and 21,402.25

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Solution

The fourth proportional to 39,307.25, 54,243.74 and 21,402.25 is: 29,534.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,307.25 : 54,243.74 = 21,402.25 : x
  2. Step 2: Convert to fraction form
    39,307.25/54,243.74 = 21,402.25/x
  3. Step 3: Cross multiply
    39,307.25x = 54,243.74 × 21,402.25
  4. Step 4: Simplify right side
    39,307.25x = 1,160,938,002.31
  5. Step 5: Solve for x
    x = 1,160,938,002.31/39,307.25
  6. Step 6: Final answer
    x = 29,534.96

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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.