Home / 12,011.10-18,011.58-4,218.09

Finding the Fourth Proportional to 12,011.10, 18,011.58 and 4,218.09

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Solution

The fourth proportional to 12,011.10, 18,011.58 and 4,218.09 is: 6,325.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,011.10 : 18,011.58 = 4,218.09 : x
  2. Step 2: Convert to fraction form
    12,011.10/18,011.58 = 4,218.09/x
  3. Step 3: Cross multiply
    12,011.10x = 18,011.58 × 4,218.09
  4. Step 4: Simplify right side
    12,011.10x = 75,974,465.48
  5. Step 5: Solve for x
    x = 75,974,465.48/12,011.10
  6. Step 6: Final answer
    x = 6,325.35

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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.