Home / 13,188.06-18,203.70-8,715.78

Finding the Fourth Proportional to 13,188.06, 18,203.70 and 8,715.78

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Solution

The fourth proportional to 13,188.06, 18,203.70 and 8,715.78 is: 12,030.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.06 : 18,203.70 = 8,715.78 : x
  2. Step 2: Convert to fraction form
    13,188.06/18,203.70 = 8,715.78/x
  3. Step 3: Cross multiply
    13,188.06x = 18,203.70 × 8,715.78
  4. Step 4: Simplify right side
    13,188.06x = 158,659,444.39
  5. Step 5: Solve for x
    x = 158,659,444.39/13,188.06
  6. Step 6: Final answer
    x = 12,030.54

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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.