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Finding the Fourth Proportional to 26,687.49, 36,829.13 and 15,509.49

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Solution

The fourth proportional to 26,687.49, 36,829.13 and 15,509.49 is: 21,403.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,687.49 : 36,829.13 = 15,509.49 : x
  2. Step 2: Convert to fraction form
    26,687.49/36,829.13 = 15,509.49/x
  3. Step 3: Cross multiply
    26,687.49x = 36,829.13 × 15,509.49
  4. Step 4: Simplify right side
    26,687.49x = 571,200,945.90
  5. Step 5: Solve for x
    x = 571,200,945.90/26,687.49
  6. Step 6: Final answer
    x = 21,403.32

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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.