Home / 15,921.16-21,981.12-10,258.72

Finding the Fourth Proportional to 15,921.16, 21,981.12 and 10,258.72

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Solution

The fourth proportional to 15,921.16, 21,981.12 and 10,258.72 is: 14,163.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,921.16 : 21,981.12 = 10,258.72 : x
  2. Step 2: Convert to fraction form
    15,921.16/21,981.12 = 10,258.72/x
  3. Step 3: Cross multiply
    15,921.16x = 21,981.12 × 10,258.72
  4. Step 4: Simplify right side
    15,921.16x = 225,498,155.37
  5. Step 5: Solve for x
    x = 225,498,155.37/15,921.16
  6. Step 6: Final answer
    x = 14,163.42

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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.