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Finding the Fourth Proportional to 20,011.99, 30,019.50 and 5,970.91

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Solution

The fourth proportional to 20,011.99, 30,019.50 and 5,970.91 is: 8,956.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,011.99 : 30,019.50 = 5,970.91 : x
  2. Step 2: Convert to fraction form
    20,011.99/30,019.50 = 5,970.91/x
  3. Step 3: Cross multiply
    20,011.99x = 30,019.50 × 5,970.91
  4. Step 4: Simplify right side
    20,011.99x = 179,243,732.75
  5. Step 5: Solve for x
    x = 179,243,732.75/20,011.99
  6. Step 6: Final answer
    x = 8,956.82

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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.