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Finding the Fourth Proportional to 20,415.88, 30,599.22 and 10,549.84

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Solution

The fourth proportional to 20,415.88, 30,599.22 and 10,549.84 is: 15,812.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.88 : 30,599.22 = 10,549.84 : x
  2. Step 2: Convert to fraction form
    20,415.88/30,599.22 = 10,549.84/x
  3. Step 3: Cross multiply
    20,415.88x = 30,599.22 × 10,549.84
  4. Step 4: Simplify right side
    20,415.88x = 322,816,875.12
  5. Step 5: Solve for x
    x = 322,816,875.12/20,415.88
  6. Step 6: Final answer
    x = 15,812.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.