Home / 11,142.80-15,378.36-6,427.24

Finding the Fourth Proportional to 11,142.80, 15,378.36 and 6,427.24

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Solution

The fourth proportional to 11,142.80, 15,378.36 and 6,427.24 is: 8,870.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,142.80 : 15,378.36 = 6,427.24 : x
  2. Step 2: Convert to fraction form
    11,142.80/15,378.36 = 6,427.24/x
  3. Step 3: Cross multiply
    11,142.80x = 15,378.36 × 6,427.24
  4. Step 4: Simplify right side
    11,142.80x = 98,840,410.53
  5. Step 5: Solve for x
    x = 98,840,410.53/11,142.80
  6. Step 6: Final answer
    x = 8,870.34

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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.