Home / 8,911.50-12,283.70-7,020.09

Finding the Fourth Proportional to 8,911.50, 12,283.70 and 7,020.09

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Solution

The fourth proportional to 8,911.50, 12,283.70 and 7,020.09 is: 9,676.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.50 : 12,283.70 = 7,020.09 : x
  2. Step 2: Convert to fraction form
    8,911.50/12,283.70 = 7,020.09/x
  3. Step 3: Cross multiply
    8,911.50x = 12,283.70 × 7,020.09
  4. Step 4: Simplify right side
    8,911.50x = 86,232,679.53
  5. Step 5: Solve for x
    x = 86,232,679.53/8,911.50
  6. Step 6: Final answer
    x = 9,676.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.