Home / 13,316.40-20,004.30-11,129.40

Finding the Fourth Proportional to 13,316.40, 20,004.30 and 11,129.40

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Solution

The fourth proportional to 13,316.40, 20,004.30 and 11,129.40 is: 16,718.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,316.40 : 20,004.30 = 11,129.40 : x
  2. Step 2: Convert to fraction form
    13,316.40/20,004.30 = 11,129.40/x
  3. Step 3: Cross multiply
    13,316.40x = 20,004.30 × 11,129.40
  4. Step 4: Simplify right side
    13,316.40x = 222,635,856.42
  5. Step 5: Solve for x
    x = 222,635,856.42/13,316.40
  6. Step 6: Final answer
    x = 16,718.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.