Home / 21,012.52-28,997.19-11,581.08

Finding the Fourth Proportional to 21,012.52, 28,997.19 and 11,581.08

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Solution

The fourth proportional to 21,012.52, 28,997.19 and 11,581.08 is: 15,981.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.52 : 28,997.19 = 11,581.08 : x
  2. Step 2: Convert to fraction form
    21,012.52/28,997.19 = 11,581.08/x
  3. Step 3: Cross multiply
    21,012.52x = 28,997.19 × 11,581.08
  4. Step 4: Simplify right side
    21,012.52x = 335,818,777.17
  5. Step 5: Solve for x
    x = 335,818,777.17/21,012.52
  6. Step 6: Final answer
    x = 15,981.84

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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.