Home / 13,108.29-18,106.75-9,712.20

Finding the Fourth Proportional to 13,108.29, 18,106.75 and 9,712.20

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Solution

The fourth proportional to 13,108.29, 18,106.75 and 9,712.20 is: 13,415.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.29 : 18,106.75 = 9,712.20 : x
  2. Step 2: Convert to fraction form
    13,108.29/18,106.75 = 9,712.20/x
  3. Step 3: Cross multiply
    13,108.29x = 18,106.75 × 9,712.20
  4. Step 4: Simplify right side
    13,108.29x = 175,856,377.35
  5. Step 5: Solve for x
    x = 175,856,377.35/13,108.29
  6. Step 6: Final answer
    x = 13,415.66

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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.