Home / 21,011.69-28,996.14-11,451.58

Finding the Fourth Proportional to 21,011.69, 28,996.14 and 11,451.58

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Solution

The fourth proportional to 21,011.69, 28,996.14 and 11,451.58 is: 15,803.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.69 : 28,996.14 = 11,451.58 : x
  2. Step 2: Convert to fraction form
    21,011.69/28,996.14 = 11,451.58/x
  3. Step 3: Cross multiply
    21,011.69x = 28,996.14 × 11,451.58
  4. Step 4: Simplify right side
    21,011.69x = 332,051,616.90
  5. Step 5: Solve for x
    x = 332,051,616.90/21,011.69
  6. Step 6: Final answer
    x = 15,803.18

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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.