Home / 13,288.80-18,338.78-7,320.40

Finding the Fourth Proportional to 13,288.80, 18,338.78 and 7,320.40

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Solution

The fourth proportional to 13,288.80, 18,338.78 and 7,320.40 is: 10,102.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.80 : 18,338.78 = 7,320.40 : x
  2. Step 2: Convert to fraction form
    13,288.80/18,338.78 = 7,320.40/x
  3. Step 3: Cross multiply
    13,288.80x = 18,338.78 × 7,320.40
  4. Step 4: Simplify right side
    13,288.80x = 134,247,205.11
  5. Step 5: Solve for x
    x = 134,247,205.11/13,288.80
  6. Step 6: Final answer
    x = 10,102.28

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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.