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Finding the Fourth Proportional to 15,019.77, 20,724.08 and 8,728.77

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Solution

The fourth proportional to 15,019.77, 20,724.08 and 8,728.77 is: 12,043.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,019.77 : 20,724.08 = 8,728.77 : x
  2. Step 2: Convert to fraction form
    15,019.77/20,724.08 = 8,728.77/x
  3. Step 3: Cross multiply
    15,019.77x = 20,724.08 × 8,728.77
  4. Step 4: Simplify right side
    15,019.77x = 180,895,684.14
  5. Step 5: Solve for x
    x = 180,895,684.14/15,019.77
  6. Step 6: Final answer
    x = 12,043.84

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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.