Home / 13,420.19-20,112.87-5,513.76

Finding the Fourth Proportional to 13,420.19, 20,112.87 and 5,513.76

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Solution

The fourth proportional to 13,420.19, 20,112.87 and 5,513.76 is: 8,263.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.19 : 20,112.87 = 5,513.76 : x
  2. Step 2: Convert to fraction form
    13,420.19/20,112.87 = 5,513.76/x
  3. Step 3: Cross multiply
    13,420.19x = 20,112.87 × 5,513.76
  4. Step 4: Simplify right side
    13,420.19x = 110,897,538.09
  5. Step 5: Solve for x
    x = 110,897,538.09/13,420.19
  6. Step 6: Final answer
    x = 8,263.49

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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.