Home / 13,976.19-19,280.36-8,672.72

Finding the Fourth Proportional to 13,976.19, 19,280.36 and 8,672.72

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Solution

The fourth proportional to 13,976.19, 19,280.36 and 8,672.72 is: 11,964.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,976.19 : 19,280.36 = 8,672.72 : x
  2. Step 2: Convert to fraction form
    13,976.19/19,280.36 = 8,672.72/x
  3. Step 3: Cross multiply
    13,976.19x = 19,280.36 × 8,672.72
  4. Step 4: Simplify right side
    13,976.19x = 167,213,089.06
  5. Step 5: Solve for x
    x = 167,213,089.06/13,976.19
  6. Step 6: Final answer
    x = 11,964.14

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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.