Home / 12,139.84-18,209.76-4,745.08

Finding the Fourth Proportional to 12,139.84, 18,209.76 and 4,745.08

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Solution

The fourth proportional to 12,139.84, 18,209.76 and 4,745.08 is: 7,117.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.84 : 18,209.76 = 4,745.08 : x
  2. Step 2: Convert to fraction form
    12,139.84/18,209.76 = 4,745.08/x
  3. Step 3: Cross multiply
    12,139.84x = 18,209.76 × 4,745.08
  4. Step 4: Simplify right side
    12,139.84x = 86,406,767.98
  5. Step 5: Solve for x
    x = 86,406,767.98/12,139.84
  6. Step 6: Final answer
    x = 7,117.62

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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.