Home / 18,115.12-25,009.59-11,406.50

Finding the Fourth Proportional to 18,115.12, 25,009.59 and 11,406.50

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Solution

The fourth proportional to 18,115.12, 25,009.59 and 11,406.50 is: 15,747.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.12 : 25,009.59 = 11,406.50 : x
  2. Step 2: Convert to fraction form
    18,115.12/25,009.59 = 11,406.50/x
  3. Step 3: Cross multiply
    18,115.12x = 25,009.59 × 11,406.50
  4. Step 4: Simplify right side
    18,115.12x = 285,271,888.34
  5. Step 5: Solve for x
    x = 285,271,888.34/18,115.12
  6. Step 6: Final answer
    x = 15,747.72

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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.