Home / 13,855.12-19,118.52-7,886.20

Finding the Fourth Proportional to 13,855.12, 19,118.52 and 7,886.20

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Solution

The fourth proportional to 13,855.12, 19,118.52 and 7,886.20 is: 10,882.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.12 : 19,118.52 = 7,886.20 : x
  2. Step 2: Convert to fraction form
    13,855.12/19,118.52 = 7,886.20/x
  3. Step 3: Cross multiply
    13,855.12x = 19,118.52 × 7,886.20
  4. Step 4: Simplify right side
    13,855.12x = 150,772,472.42
  5. Step 5: Solve for x
    x = 150,772,472.42/13,855.12
  6. Step 6: Final answer
    x = 10,882.08

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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.