Home / 5,321.09-7,981.51-1,425.50

Finding the Fourth Proportional to 5,321.09, 7,981.51 and 1,425.50

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Solution

The fourth proportional to 5,321.09, 7,981.51 and 1,425.50 is: 2,138.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.09 : 7,981.51 = 1,425.50 : x
  2. Step 2: Convert to fraction form
    5,321.09/7,981.51 = 1,425.50/x
  3. Step 3: Cross multiply
    5,321.09x = 7,981.51 × 1,425.50
  4. Step 4: Simplify right side
    5,321.09x = 11,377,642.51
  5. Step 5: Solve for x
    x = 11,377,642.51/5,321.09
  6. Step 6: Final answer
    x = 2,138.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.