Home / 18,742.79-28,100.30-11,345.50

Finding the Fourth Proportional to 18,742.79, 28,100.30 and 11,345.50

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Solution

The fourth proportional to 18,742.79, 28,100.30 and 11,345.50 is: 17,009.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,742.79 : 28,100.30 = 11,345.50 : x
  2. Step 2: Convert to fraction form
    18,742.79/28,100.30 = 11,345.50/x
  3. Step 3: Cross multiply
    18,742.79x = 28,100.30 × 11,345.50
  4. Step 4: Simplify right side
    18,742.79x = 318,811,995.87
  5. Step 5: Solve for x
    x = 318,811,995.87/18,742.79
  6. Step 6: Final answer
    x = 17,009.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.