Home / 15,189-20,961.63-8,903.40

Finding the Fourth Proportional to 15,189, 20,961.63 and 8,903.40

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Solution

The fourth proportional to 15,189, 20,961.63 and 8,903.40 is: 12,287.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,189 : 20,961.63 = 8,903.40 : x
  2. Step 2: Convert to fraction form
    15,189/20,961.63 = 8,903.40/x
  3. Step 3: Cross multiply
    15,189x = 20,961.63 × 8,903.40
  4. Step 4: Simplify right side
    15,189x = 186,629,776.54
  5. Step 5: Solve for x
    x = 186,629,776.54/15,189
  6. Step 6: Final answer
    x = 12,287.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.