Home / 21,005.16-28,986.99-11,445.02

Finding the Fourth Proportional to 21,005.16, 28,986.99 and 11,445.02

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Solution

The fourth proportional to 21,005.16, 28,986.99 and 11,445.02 is: 15,794.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.16 : 28,986.99 = 11,445.02 : x
  2. Step 2: Convert to fraction form
    21,005.16/28,986.99 = 11,445.02/x
  3. Step 3: Cross multiply
    21,005.16x = 28,986.99 × 11,445.02
  4. Step 4: Simplify right side
    21,005.16x = 331,756,680.29
  5. Step 5: Solve for x
    x = 331,756,680.29/21,005.16
  6. Step 6: Final answer
    x = 15,794.06

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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.