Home / 13,148.68-18,141.84-8,439.32

Finding the Fourth Proportional to 13,148.68, 18,141.84 and 8,439.32

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Solution

The fourth proportional to 13,148.68, 18,141.84 and 8,439.32 is: 11,644.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,148.68 : 18,141.84 = 8,439.32 : x
  2. Step 2: Convert to fraction form
    13,148.68/18,141.84 = 8,439.32/x
  3. Step 3: Cross multiply
    13,148.68x = 18,141.84 × 8,439.32
  4. Step 4: Simplify right side
    13,148.68x = 153,104,793.15
  5. Step 5: Solve for x
    x = 153,104,793.15/13,148.68
  6. Step 6: Final answer
    x = 11,644.12

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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.