Home / 22,416.75-30,935.12-12,990.78

Finding the Fourth Proportional to 22,416.75, 30,935.12 and 12,990.78

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Solution

The fourth proportional to 22,416.75, 30,935.12 and 12,990.78 is: 17,927.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,416.75 : 30,935.12 = 12,990.78 : x
  2. Step 2: Convert to fraction form
    22,416.75/30,935.12 = 12,990.78/x
  3. Step 3: Cross multiply
    22,416.75x = 30,935.12 × 12,990.78
  4. Step 4: Simplify right side
    22,416.75x = 401,871,273.24
  5. Step 5: Solve for x
    x = 401,871,273.24/22,416.75
  6. Step 6: Final answer
    x = 17,927.28

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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.