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Finding the Fourth Proportional to 28,042.60, 38,671.14 and 21,752.68

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Solution

The fourth proportional to 28,042.60, 38,671.14 and 21,752.68 is: 29,997.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,042.60 : 38,671.14 = 21,752.68 : x
  2. Step 2: Convert to fraction form
    28,042.60/38,671.14 = 21,752.68/x
  3. Step 3: Cross multiply
    28,042.60x = 38,671.14 × 21,752.68
  4. Step 4: Simplify right side
    28,042.60x = 841,200,933.66
  5. Step 5: Solve for x
    x = 841,200,933.66/28,042.60
  6. Step 6: Final answer
    x = 29,997.25

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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.