Home / 21,012.51-28,997.27-11,581.08

Finding the Fourth Proportional to 21,012.51, 28,997.27 and 11,581.08

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Solution

The fourth proportional to 21,012.51, 28,997.27 and 11,581.08 is: 15,981.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.51 : 28,997.27 = 11,581.08 : x
  2. Step 2: Convert to fraction form
    21,012.51/28,997.27 = 11,581.08/x
  3. Step 3: Cross multiply
    21,012.51x = 28,997.27 × 11,581.08
  4. Step 4: Simplify right side
    21,012.51x = 335,819,547.86
  5. Step 5: Solve for x
    x = 335,819,547.86/21,012.51
  6. Step 6: Final answer
    x = 15,981.88

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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.