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Finding the Fourth Proportional to 28,179.74, 38,887.98 and 16,243

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Solution

The fourth proportional to 28,179.74, 38,887.98 and 16,243 is: 22,415.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,179.74 : 38,887.98 = 16,243 : x
  2. Step 2: Convert to fraction form
    28,179.74/38,887.98 = 16,243/x
  3. Step 3: Cross multiply
    28,179.74x = 38,887.98 × 16,243
  4. Step 4: Simplify right side
    28,179.74x = 631,657,459.14
  5. Step 5: Solve for x
    x = 631,657,459.14/28,179.74
  6. Step 6: Final answer
    x = 22,415.30

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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.