Home / 19,691.21-27,158.51-12,618.29

Finding the Fourth Proportional to 19,691.21, 27,158.51 and 12,618.29

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Solution

The fourth proportional to 19,691.21, 27,158.51 and 12,618.29 is: 17,403.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,691.21 : 27,158.51 = 12,618.29 : x
  2. Step 2: Convert to fraction form
    19,691.21/27,158.51 = 12,618.29/x
  3. Step 3: Cross multiply
    19,691.21x = 27,158.51 × 12,618.29
  4. Step 4: Simplify right side
    19,691.21x = 342,693,855.71
  5. Step 5: Solve for x
    x = 342,693,855.71/19,691.21
  6. Step 6: Final answer
    x = 17,403.39

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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.