Home / 20,756.17-28,643.70-11,324.89

Finding the Fourth Proportional to 20,756.17, 28,643.70 and 11,324.89

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Solution

The fourth proportional to 20,756.17, 28,643.70 and 11,324.89 is: 15,628.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.17 : 28,643.70 = 11,324.89 : x
  2. Step 2: Convert to fraction form
    20,756.17/28,643.70 = 11,324.89/x
  3. Step 3: Cross multiply
    20,756.17x = 28,643.70 × 11,324.89
  4. Step 4: Simplify right side
    20,756.17x = 324,386,751.69
  5. Step 5: Solve for x
    x = 324,386,751.69/20,756.17
  6. Step 6: Final answer
    x = 15,628.45

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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.