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Finding the Fourth Proportional to 52,656, 78,984 and 15,720

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Solution

The fourth proportional to 52,656, 78,984 and 15,720 is: 23,580

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,656 : 78,984 = 15,720 : x
  2. Step 2: Convert to fraction form
    52,656/78,984 = 15,720/x
  3. Step 3: Cross multiply
    52,656x = 78,984 × 15,720
  4. Step 4: Simplify right side
    52,656x = 1,241,628,480
  5. Step 5: Solve for x
    x = 1,241,628,480/52,656
  6. Step 6: Final answer
    x = 23,580

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.