Home / 13,109.13-18,085.50-8,635.08

Finding the Fourth Proportional to 13,109.13, 18,085.50 and 8,635.08

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Solution

The fourth proportional to 13,109.13, 18,085.50 and 8,635.08 is: 11,913.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.13 : 18,085.50 = 8,635.08 : x
  2. Step 2: Convert to fraction form
    13,109.13/18,085.50 = 8,635.08/x
  3. Step 3: Cross multiply
    13,109.13x = 18,085.50 × 8,635.08
  4. Step 4: Simplify right side
    13,109.13x = 156,169,739.34
  5. Step 5: Solve for x
    x = 156,169,739.34/13,109.13
  6. Step 6: Final answer
    x = 11,913.05

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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.