Home / 13,289.31-18,339.20-7,320.97

Finding the Fourth Proportional to 13,289.31, 18,339.20 and 7,320.97

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Solution

The fourth proportional to 13,289.31, 18,339.20 and 7,320.97 is: 10,102.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.31 : 18,339.20 = 7,320.97 : x
  2. Step 2: Convert to fraction form
    13,289.31/18,339.20 = 7,320.97/x
  3. Step 3: Cross multiply
    13,289.31x = 18,339.20 × 7,320.97
  4. Step 4: Simplify right side
    13,289.31x = 134,260,733.02
  5. Step 5: Solve for x
    x = 134,260,733.02/13,289.31
  6. Step 6: Final answer
    x = 10,102.91

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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.