Home / 13,855.12-19,116.48-8,817.28

Finding the Fourth Proportional to 13,855.12, 19,116.48 and 8,817.28

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Solution

The fourth proportional to 13,855.12, 19,116.48 and 8,817.28 is: 12,165.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.12 : 19,116.48 = 8,817.28 : x
  2. Step 2: Convert to fraction form
    13,855.12/19,116.48 = 8,817.28/x
  3. Step 3: Cross multiply
    13,855.12x = 19,116.48 × 8,817.28
  4. Step 4: Simplify right side
    13,855.12x = 168,555,356.77
  5. Step 5: Solve for x
    x = 168,555,356.77/13,855.12
  6. Step 6: Final answer
    x = 12,165.56

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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.