Home / 13,120.50-18,101.16-8,646.60

Finding the Fourth Proportional to 13,120.50, 18,101.16 and 8,646.60

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Solution

The fourth proportional to 13,120.50, 18,101.16 and 8,646.60 is: 11,928.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.50 : 18,101.16 = 8,646.60 : x
  2. Step 2: Convert to fraction form
    13,120.50/18,101.16 = 8,646.60/x
  3. Step 3: Cross multiply
    13,120.50x = 18,101.16 × 8,646.60
  4. Step 4: Simplify right side
    13,120.50x = 156,513,490.06
  5. Step 5: Solve for x
    x = 156,513,490.06/13,120.50
  6. Step 6: Final answer
    x = 11,928.93

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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.