Home / 13,288.87-18,338.79-7,320.41

Finding the Fourth Proportional to 13,288.87, 18,338.79 and 7,320.41

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Solution

The fourth proportional to 13,288.87, 18,338.79 and 7,320.41 is: 10,102.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.87 : 18,338.79 = 7,320.41 : x
  2. Step 2: Convert to fraction form
    13,288.87/18,338.79 = 7,320.41/x
  3. Step 3: Cross multiply
    13,288.87x = 18,338.79 × 7,320.41
  4. Step 4: Simplify right side
    13,288.87x = 134,247,461.70
  5. Step 5: Solve for x
    x = 134,247,461.70/13,288.87
  6. Step 6: Final answer
    x = 10,102.25

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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.