Home / 15,455.97-21,329.09-8,742.91

Finding the Fourth Proportional to 15,455.97, 21,329.09 and 8,742.91

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Solution

The fourth proportional to 15,455.97, 21,329.09 and 8,742.91 is: 12,065.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.97 : 21,329.09 = 8,742.91 : x
  2. Step 2: Convert to fraction form
    15,455.97/21,329.09 = 8,742.91/x
  3. Step 3: Cross multiply
    15,455.97x = 21,329.09 × 8,742.91
  4. Step 4: Simplify right side
    15,455.97x = 186,478,163.89
  5. Step 5: Solve for x
    x = 186,478,163.89/15,455.97
  6. Step 6: Final answer
    x = 12,065.12

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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.