Home / 15,288.75-21,098.51-8,919.72

Finding the Fourth Proportional to 15,288.75, 21,098.51 and 8,919.72

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Solution

The fourth proportional to 15,288.75, 21,098.51 and 8,919.72 is: 12,309.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,288.75 : 21,098.51 = 8,919.72 : x
  2. Step 2: Convert to fraction form
    15,288.75/21,098.51 = 8,919.72/x
  3. Step 3: Cross multiply
    15,288.75x = 21,098.51 × 8,919.72
  4. Step 4: Simplify right side
    15,288.75x = 188,192,828.10
  5. Step 5: Solve for x
    x = 188,192,828.10/15,288.75
  6. Step 6: Final answer
    x = 12,309.24

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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.