Home / 15,693.05-21,647.36-9,401.78

Finding the Fourth Proportional to 15,693.05, 21,647.36 and 9,401.78

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Solution

The fourth proportional to 15,693.05, 21,647.36 and 9,401.78 is: 12,969.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.05 : 21,647.36 = 9,401.78 : x
  2. Step 2: Convert to fraction form
    15,693.05/21,647.36 = 9,401.78/x
  3. Step 3: Cross multiply
    15,693.05x = 21,647.36 × 9,401.78
  4. Step 4: Simplify right side
    15,693.05x = 203,523,561.06
  5. Step 5: Solve for x
    x = 203,523,561.06/15,693.05
  6. Step 6: Final answer
    x = 12,969.03

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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.