Home / 12,011.80-18,017.70-7,864.60

Finding the Fourth Proportional to 12,011.80, 18,017.70 and 7,864.60

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Solution

The fourth proportional to 12,011.80, 18,017.70 and 7,864.60 is: 11,796.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,011.80 : 18,017.70 = 7,864.60 : x
  2. Step 2: Convert to fraction form
    12,011.80/18,017.70 = 7,864.60/x
  3. Step 3: Cross multiply
    12,011.80x = 18,017.70 × 7,864.60
  4. Step 4: Simplify right side
    12,011.80x = 141,702,003.42
  5. Step 5: Solve for x
    x = 141,702,003.42/12,011.80
  6. Step 6: Final answer
    x = 11,796.90

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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.