Home / 12,189.48-18,284.85-3,870.13

Finding the Fourth Proportional to 12,189.48, 18,284.85 and 3,870.13

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Solution

The fourth proportional to 12,189.48, 18,284.85 and 3,870.13 is: 5,805.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.48 : 18,284.85 = 3,870.13 : x
  2. Step 2: Convert to fraction form
    12,189.48/18,284.85 = 3,870.13/x
  3. Step 3: Cross multiply
    12,189.48x = 18,284.85 × 3,870.13
  4. Step 4: Simplify right side
    12,189.48x = 70,764,746.53
  5. Step 5: Solve for x
    x = 70,764,746.53/12,189.48
  6. Step 6: Final answer
    x = 5,805.40

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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.