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Finding the Fourth Proportional to 20,599.76, 30,934.20 and 20,438.48

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Solution

The fourth proportional to 20,599.76, 30,934.20 and 20,438.48 is: 30,692.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,599.76 : 30,934.20 = 20,438.48 : x
  2. Step 2: Convert to fraction form
    20,599.76/30,934.20 = 20,438.48/x
  3. Step 3: Cross multiply
    20,599.76x = 30,934.20 × 20,438.48
  4. Step 4: Simplify right side
    20,599.76x = 632,248,028.02
  5. Step 5: Solve for x
    x = 632,248,028.02/20,599.76
  6. Step 6: Final answer
    x = 30,692.01

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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.