Home / 21,001.15-28,981.33-11,569.51

Finding the Fourth Proportional to 21,001.15, 28,981.33 and 11,569.51

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Solution

The fourth proportional to 21,001.15, 28,981.33 and 11,569.51 is: 15,965.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.15 : 28,981.33 = 11,569.51 : x
  2. Step 2: Convert to fraction form
    21,001.15/28,981.33 = 11,569.51/x
  3. Step 3: Cross multiply
    21,001.15x = 28,981.33 × 11,569.51
  4. Step 4: Simplify right side
    21,001.15x = 335,299,787.25
  5. Step 5: Solve for x
    x = 335,299,787.25/21,001.15
  6. Step 6: Final answer
    x = 15,965.78

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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.