Home / 13,719.20-18,935.12-8,055.20

Finding the Fourth Proportional to 13,719.20, 18,935.12 and 8,055.20

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Solution

The fourth proportional to 13,719.20, 18,935.12 and 8,055.20 is: 11,117.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.20 : 18,935.12 = 8,055.20 : x
  2. Step 2: Convert to fraction form
    13,719.20/18,935.12 = 8,055.20/x
  3. Step 3: Cross multiply
    13,719.20x = 18,935.12 × 8,055.20
  4. Step 4: Simplify right side
    13,719.20x = 152,526,178.62
  5. Step 5: Solve for x
    x = 152,526,178.62/13,719.20
  6. Step 6: Final answer
    x = 11,117.72

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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.