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Finding the Fourth Proportional to 20,303.20, 30,411.60 and 16,415.20

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Solution

The fourth proportional to 20,303.20, 30,411.60 and 16,415.20 is: 24,587.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,303.20 : 30,411.60 = 16,415.20 : x
  2. Step 2: Convert to fraction form
    20,303.20/30,411.60 = 16,415.20/x
  3. Step 3: Cross multiply
    20,303.20x = 30,411.60 × 16,415.20
  4. Step 4: Simplify right side
    20,303.20x = 499,212,496.32
  5. Step 5: Solve for x
    x = 499,212,496.32/20,303.20
  6. Step 6: Final answer
    x = 24,587.87

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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.