Home / 13,686.05-18,886.68-7,398.42

Finding the Fourth Proportional to 13,686.05, 18,886.68 and 7,398.42

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Solution

The fourth proportional to 13,686.05, 18,886.68 and 7,398.42 is: 10,209.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.05 : 18,886.68 = 7,398.42 : x
  2. Step 2: Convert to fraction form
    13,686.05/18,886.68 = 7,398.42/x
  3. Step 3: Cross multiply
    13,686.05x = 18,886.68 × 7,398.42
  4. Step 4: Simplify right side
    13,686.05x = 139,731,591.05
  5. Step 5: Solve for x
    x = 139,731,591.05/13,686.05
  6. Step 6: Final answer
    x = 10,209.79

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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.