Home / 13,678.24-18,877.98-8,372.20

Finding the Fourth Proportional to 13,678.24, 18,877.98 and 8,372.20

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Solution

The fourth proportional to 13,678.24, 18,877.98 and 8,372.20 is: 11,554.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.24 : 18,877.98 = 8,372.20 : x
  2. Step 2: Convert to fraction form
    13,678.24/18,877.98 = 8,372.20/x
  3. Step 3: Cross multiply
    13,678.24x = 18,877.98 × 8,372.20
  4. Step 4: Simplify right side
    13,678.24x = 158,050,224.16
  5. Step 5: Solve for x
    x = 158,050,224.16/13,678.24
  6. Step 6: Final answer
    x = 11,554.87

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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.