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Finding the Fourth Proportional to 15,018.64, 20,719.15 and 8,643.84

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Solution

The fourth proportional to 15,018.64, 20,719.15 and 8,643.84 is: 11,924.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018.64 : 20,719.15 = 8,643.84 : x
  2. Step 2: Convert to fraction form
    15,018.64/20,719.15 = 8,643.84/x
  3. Step 3: Cross multiply
    15,018.64x = 20,719.15 × 8,643.84
  4. Step 4: Simplify right side
    15,018.64x = 179,093,017.54
  5. Step 5: Solve for x
    x = 179,093,017.54/15,018.64
  6. Step 6: Final answer
    x = 11,924.72

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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.