Home / 15,305.05-21,122.38-8,931.16

Finding the Fourth Proportional to 15,305.05, 21,122.38 and 8,931.16

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Solution

The fourth proportional to 15,305.05, 21,122.38 and 8,931.16 is: 12,325.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,305.05 : 21,122.38 = 8,931.16 : x
  2. Step 2: Convert to fraction form
    15,305.05/21,122.38 = 8,931.16/x
  3. Step 3: Cross multiply
    15,305.05x = 21,122.38 × 8,931.16
  4. Step 4: Simplify right side
    15,305.05x = 188,647,355.36
  5. Step 5: Solve for x
    x = 188,647,355.36/15,305.05
  6. Step 6: Final answer
    x = 12,325.82

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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.