Home / 13,358.46-18,438.66-8,643.05

Finding the Fourth Proportional to 13,358.46, 18,438.66 and 8,643.05

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Solution

The fourth proportional to 13,358.46, 18,438.66 and 8,643.05 is: 11,929.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,358.46 : 18,438.66 = 8,643.05 : x
  2. Step 2: Convert to fraction form
    13,358.46/18,438.66 = 8,643.05/x
  3. Step 3: Cross multiply
    13,358.46x = 18,438.66 × 8,643.05
  4. Step 4: Simplify right side
    13,358.46x = 159,366,168.12
  5. Step 5: Solve for x
    x = 159,366,168.12/13,358.46
  6. Step 6: Final answer
    x = 11,929.98

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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.