Home / 12,011.76-18,017.64-4,218.75

Finding the Fourth Proportional to 12,011.76, 18,017.64 and 4,218.75

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Solution

The fourth proportional to 12,011.76, 18,017.64 and 4,218.75 is: 6,328.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,011.76 : 18,017.64 = 4,218.75 : x
  2. Step 2: Convert to fraction form
    12,011.76/18,017.64 = 4,218.75/x
  3. Step 3: Cross multiply
    12,011.76x = 18,017.64 × 4,218.75
  4. Step 4: Simplify right side
    12,011.76x = 76,011,918.75
  5. Step 5: Solve for x
    x = 76,011,918.75/12,011.76
  6. Step 6: Final answer
    x = 6,328.13

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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.