Home / 13,289.25-18,338.47-7,320.78

Finding the Fourth Proportional to 13,289.25, 18,338.47 and 7,320.78

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Solution

The fourth proportional to 13,289.25, 18,338.47 and 7,320.78 is: 10,102.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.25 : 18,338.47 = 7,320.78 : x
  2. Step 2: Convert to fraction form
    13,289.25/18,338.47 = 7,320.78/x
  3. Step 3: Cross multiply
    13,289.25x = 18,338.47 × 7,320.78
  4. Step 4: Simplify right side
    13,289.25x = 134,251,886.10
  5. Step 5: Solve for x
    x = 134,251,886.10/13,289.25
  6. Step 6: Final answer
    x = 10,102.29

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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.