Home / 13,118.13-18,106.25-10,129.41

Finding the Fourth Proportional to 13,118.13, 18,106.25 and 10,129.41

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Solution

The fourth proportional to 13,118.13, 18,106.25 and 10,129.41 is: 13,981.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.13 : 18,106.25 = 10,129.41 : x
  2. Step 2: Convert to fraction form
    13,118.13/18,106.25 = 10,129.41/x
  3. Step 3: Cross multiply
    13,118.13x = 18,106.25 × 10,129.41
  4. Step 4: Simplify right side
    13,118.13x = 183,405,579.17
  5. Step 5: Solve for x
    x = 183,405,579.17/13,118.13
  6. Step 6: Final answer
    x = 13,981.08

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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.