Home / 13,138.40-19,707.76-8,724.32

Finding the Fourth Proportional to 13,138.40, 19,707.76 and 8,724.32

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Solution

The fourth proportional to 13,138.40, 19,707.76 and 8,724.32 is: 13,086.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.40 : 19,707.76 = 8,724.32 : x
  2. Step 2: Convert to fraction form
    13,138.40/19,707.76 = 8,724.32/x
  3. Step 3: Cross multiply
    13,138.40x = 19,707.76 × 8,724.32
  4. Step 4: Simplify right side
    13,138.40x = 171,936,804.72
  5. Step 5: Solve for x
    x = 171,936,804.72/13,138.40
  6. Step 6: Final answer
    x = 13,086.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.