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Finding the Fourth Proportional to 20,667.87, 30,983.04 and 7,510.91

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Solution

The fourth proportional to 20,667.87, 30,983.04 and 7,510.91 is: 11,259.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.87 : 30,983.04 = 7,510.91 : x
  2. Step 2: Convert to fraction form
    20,667.87/30,983.04 = 7,510.91/x
  3. Step 3: Cross multiply
    20,667.87x = 30,983.04 × 7,510.91
  4. Step 4: Simplify right side
    20,667.87x = 232,710,670.05
  5. Step 5: Solve for x
    x = 232,710,670.05/20,667.87
  6. Step 6: Final answer
    x = 11,259.54

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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.