Home / 13,398.12-18,491.61-12,807.54

Finding the Fourth Proportional to 13,398.12, 18,491.61 and 12,807.54

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Solution

The fourth proportional to 13,398.12, 18,491.61 and 12,807.54 is: 17,676.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.12 : 18,491.61 = 12,807.54 : x
  2. Step 2: Convert to fraction form
    13,398.12/18,491.61 = 12,807.54/x
  3. Step 3: Cross multiply
    13,398.12x = 18,491.61 × 12,807.54
  4. Step 4: Simplify right side
    13,398.12x = 236,832,034.74
  5. Step 5: Solve for x
    x = 236,832,034.74/13,398.12
  6. Step 6: Final answer
    x = 17,676.51

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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.