Home / 13,424.31-20,143.55-9,756.90

Finding the Fourth Proportional to 13,424.31, 20,143.55 and 9,756.90

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Solution

The fourth proportional to 13,424.31, 20,143.55 and 9,756.90 is: 14,640.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.31 : 20,143.55 = 9,756.90 : x
  2. Step 2: Convert to fraction form
    13,424.31/20,143.55 = 9,756.90/x
  3. Step 3: Cross multiply
    13,424.31x = 20,143.55 × 9,756.90
  4. Step 4: Simplify right side
    13,424.31x = 196,538,627.39
  5. Step 5: Solve for x
    x = 196,538,627.39/13,424.31
  6. Step 6: Final answer
    x = 14,640.50

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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.