Home / 13,240.45-18,272.11-7,272.51

Finding the Fourth Proportional to 13,240.45, 18,272.11 and 7,272.51

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Solution

The fourth proportional to 13,240.45, 18,272.11 and 7,272.51 is: 10,036.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.45 : 18,272.11 = 7,272.51 : x
  2. Step 2: Convert to fraction form
    13,240.45/18,272.11 = 7,272.51/x
  3. Step 3: Cross multiply
    13,240.45x = 18,272.11 × 7,272.51
  4. Step 4: Simplify right side
    13,240.45x = 132,884,102.70
  5. Step 5: Solve for x
    x = 132,884,102.70/13,240.45
  6. Step 6: Final answer
    x = 10,036.22

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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.