Home / 21,000.74-28,981.13-11,569.23

Finding the Fourth Proportional to 21,000.74, 28,981.13 and 11,569.23

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Solution

The fourth proportional to 21,000.74, 28,981.13 and 11,569.23 is: 15,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.74 : 28,981.13 = 11,569.23 : x
  2. Step 2: Convert to fraction form
    21,000.74/28,981.13 = 11,569.23/x
  3. Step 3: Cross multiply
    21,000.74x = 28,981.13 × 11,569.23
  4. Step 4: Simplify right side
    21,000.74x = 335,289,300.78
  5. Step 5: Solve for x
    x = 335,289,300.78/21,000.74
  6. Step 6: Final answer
    x = 15,965.60

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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.