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Finding the Fourth Proportional to 15,723.59, 21,698.51 and 8,649.99

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Solution

The fourth proportional to 15,723.59, 21,698.51 and 8,649.99 is: 11,936.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,723.59 : 21,698.51 = 8,649.99 : x
  2. Step 2: Convert to fraction form
    15,723.59/21,698.51 = 8,649.99/x
  3. Step 3: Cross multiply
    15,723.59x = 21,698.51 × 8,649.99
  4. Step 4: Simplify right side
    15,723.59x = 187,691,851.26
  5. Step 5: Solve for x
    x = 187,691,851.26/15,723.59
  6. Step 6: Final answer
    x = 11,936.96

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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.