Home / 13,920.31-19,199.19-8,618.05

Finding the Fourth Proportional to 13,920.31, 19,199.19 and 8,618.05

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Solution

The fourth proportional to 13,920.31, 19,199.19 and 8,618.05 is: 11,886.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.31 : 19,199.19 = 8,618.05 : x
  2. Step 2: Convert to fraction form
    13,920.31/19,199.19 = 8,618.05/x
  3. Step 3: Cross multiply
    13,920.31x = 19,199.19 × 8,618.05
  4. Step 4: Simplify right side
    13,920.31x = 165,459,579.38
  5. Step 5: Solve for x
    x = 165,459,579.38/13,920.31
  6. Step 6: Final answer
    x = 11,886.20

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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.