Home / 21,010.56-28,995.87-11,579.10

Finding the Fourth Proportional to 21,010.56, 28,995.87 and 11,579.10

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Solution

The fourth proportional to 21,010.56, 28,995.87 and 11,579.10 is: 15,979.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.56 : 28,995.87 = 11,579.10 : x
  2. Step 2: Convert to fraction form
    21,010.56/28,995.87 = 11,579.10/x
  3. Step 3: Cross multiply
    21,010.56x = 28,995.87 × 11,579.10
  4. Step 4: Simplify right side
    21,010.56x = 335,746,078.32
  5. Step 5: Solve for x
    x = 335,746,078.32/21,010.56
  6. Step 6: Final answer
    x = 15,979.87

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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.