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Finding the Fourth Proportional to 20,298.80, 30,447.93 and 5,509.10

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Solution

The fourth proportional to 20,298.80, 30,447.93 and 5,509.10 is: 8,263.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,298.80 : 30,447.93 = 5,509.10 : x
  2. Step 2: Convert to fraction form
    20,298.80/30,447.93 = 5,509.10/x
  3. Step 3: Cross multiply
    20,298.80x = 30,447.93 × 5,509.10
  4. Step 4: Simplify right side
    20,298.80x = 167,740,691.16
  5. Step 5: Solve for x
    x = 167,740,691.16/20,298.80
  6. Step 6: Final answer
    x = 8,263.58

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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.