Home / 13,122.16-18,108.64-8,409.18

Finding the Fourth Proportional to 13,122.16, 18,108.64 and 8,409.18

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Solution

The fourth proportional to 13,122.16, 18,108.64 and 8,409.18 is: 11,604.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.16 : 18,108.64 = 8,409.18 : x
  2. Step 2: Convert to fraction form
    13,122.16/18,108.64 = 8,409.18/x
  3. Step 3: Cross multiply
    13,122.16x = 18,108.64 × 8,409.18
  4. Step 4: Simplify right side
    13,122.16x = 152,278,701.75
  5. Step 5: Solve for x
    x = 152,278,701.75/13,122.16
  6. Step 6: Final answer
    x = 11,604.70

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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.