Home / 13,218.40-18,242.84-8,442.74

Finding the Fourth Proportional to 13,218.40, 18,242.84 and 8,442.74

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Solution

The fourth proportional to 13,218.40, 18,242.84 and 8,442.74 is: 11,651.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.40 : 18,242.84 = 8,442.74 : x
  2. Step 2: Convert to fraction form
    13,218.40/18,242.84 = 8,442.74/x
  3. Step 3: Cross multiply
    13,218.40x = 18,242.84 × 8,442.74
  4. Step 4: Simplify right side
    13,218.40x = 154,019,554.98
  5. Step 5: Solve for x
    x = 154,019,554.98/13,218.40
  6. Step 6: Final answer
    x = 11,651.91

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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.