Home / 13,385.32-18,474.80-8,909.24

Finding the Fourth Proportional to 13,385.32, 18,474.80 and 8,909.24

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Solution

The fourth proportional to 13,385.32, 18,474.80 and 8,909.24 is: 12,296.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.32 : 18,474.80 = 8,909.24 : x
  2. Step 2: Convert to fraction form
    13,385.32/18,474.80 = 8,909.24/x
  3. Step 3: Cross multiply
    13,385.32x = 18,474.80 × 8,909.24
  4. Step 4: Simplify right side
    13,385.32x = 164,596,427.15
  5. Step 5: Solve for x
    x = 164,596,427.15/13,385.32
  6. Step 6: Final answer
    x = 12,296.79

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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.