Home / 19,116.32-28,659.36-9,115.80

Finding the Fourth Proportional to 19,116.32, 28,659.36 and 9,115.80

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Solution

The fourth proportional to 19,116.32, 28,659.36 and 9,115.80 is: 13,666.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,116.32 : 28,659.36 = 9,115.80 : x
  2. Step 2: Convert to fraction form
    19,116.32/28,659.36 = 9,115.80/x
  3. Step 3: Cross multiply
    19,116.32x = 28,659.36 × 9,115.80
  4. Step 4: Simplify right side
    19,116.32x = 261,252,993.89
  5. Step 5: Solve for x
    x = 261,252,993.89/19,116.32
  6. Step 6: Final answer
    x = 13,666.49

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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.