Home / 13,399.77-20,106.45-6,378.48

Finding the Fourth Proportional to 13,399.77, 20,106.45 and 6,378.48

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Solution

The fourth proportional to 13,399.77, 20,106.45 and 6,378.48 is: 9,570.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.77 : 20,106.45 = 6,378.48 : x
  2. Step 2: Convert to fraction form
    13,399.77/20,106.45 = 6,378.48/x
  3. Step 3: Cross multiply
    13,399.77x = 20,106.45 × 6,378.48
  4. Step 4: Simplify right side
    13,399.77x = 128,248,589.20
  5. Step 5: Solve for x
    x = 128,248,589.20/13,399.77
  6. Step 6: Final answer
    x = 9,570.95

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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.