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Finding the Fourth Proportional to 20,151.80, 30,230.64 and 7,000.64

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Solution

The fourth proportional to 20,151.80, 30,230.64 and 7,000.64 is: 10,501.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,151.80 : 30,230.64 = 7,000.64 : x
  2. Step 2: Convert to fraction form
    20,151.80/30,230.64 = 7,000.64/x
  3. Step 3: Cross multiply
    20,151.80x = 30,230.64 × 7,000.64
  4. Step 4: Simplify right side
    20,151.80x = 211,633,827.61
  5. Step 5: Solve for x
    x = 211,633,827.61/20,151.80
  6. Step 6: Final answer
    x = 10,501.98

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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.