Home / 21,011.62-28,995.29-11,451.31

Finding the Fourth Proportional to 21,011.62, 28,995.29 and 11,451.31

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Solution

The fourth proportional to 21,011.62, 28,995.29 and 11,451.31 is: 15,802.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.62 : 28,995.29 = 11,451.31 : x
  2. Step 2: Convert to fraction form
    21,011.62/28,995.29 = 11,451.31/x
  3. Step 3: Cross multiply
    21,011.62x = 28,995.29 × 11,451.31
  4. Step 4: Simplify right side
    21,011.62x = 332,034,010.47
  5. Step 5: Solve for x
    x = 332,034,010.47/21,011.62
  6. Step 6: Final answer
    x = 15,802.40

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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.