Home / 13,289.71-18,339.13-7,321.25

Finding the Fourth Proportional to 13,289.71, 18,339.13 and 7,321.25

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Solution

The fourth proportional to 13,289.71, 18,339.13 and 7,321.25 is: 10,102.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.71 : 18,339.13 = 7,321.25 : x
  2. Step 2: Convert to fraction form
    13,289.71/18,339.13 = 7,321.25/x
  3. Step 3: Cross multiply
    13,289.71x = 18,339.13 × 7,321.25
  4. Step 4: Simplify right side
    13,289.71x = 134,265,355.51
  5. Step 5: Solve for x
    x = 134,265,355.51/13,289.71
  6. Step 6: Final answer
    x = 10,102.96

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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.