Home / 22,161.60-30,581.28-12,728.16

Finding the Fourth Proportional to 22,161.60, 30,581.28 and 12,728.16

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Solution

The fourth proportional to 22,161.60, 30,581.28 and 12,728.16 is: 17,563.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,161.60 : 30,581.28 = 12,728.16 : x
  2. Step 2: Convert to fraction form
    22,161.60/30,581.28 = 12,728.16/x
  3. Step 3: Cross multiply
    22,161.60x = 30,581.28 × 12,728.16
  4. Step 4: Simplify right side
    22,161.60x = 389,243,424.84
  5. Step 5: Solve for x
    x = 389,243,424.84/22,161.60
  6. Step 6: Final answer
    x = 17,563.87

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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.