Home / 13,555.91-20,329.17-6,439.32

Finding the Fourth Proportional to 13,555.91, 20,329.17 and 6,439.32

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Solution

The fourth proportional to 13,555.91, 20,329.17 and 6,439.32 is: 9,656.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,555.91 : 20,329.17 = 6,439.32 : x
  2. Step 2: Convert to fraction form
    13,555.91/20,329.17 = 6,439.32/x
  3. Step 3: Cross multiply
    13,555.91x = 20,329.17 × 6,439.32
  4. Step 4: Simplify right side
    13,555.91x = 130,906,030.96
  5. Step 5: Solve for x
    x = 130,906,030.96/13,555.91
  6. Step 6: Final answer
    x = 9,656.75

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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.