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Finding the Fourth Proportional to 15,841.70, 21,862.65 and 8,768.58

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Solution

The fourth proportional to 15,841.70, 21,862.65 and 8,768.58 is: 12,101.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,841.70 : 21,862.65 = 8,768.58 : x
  2. Step 2: Convert to fraction form
    15,841.70/21,862.65 = 8,768.58/x
  3. Step 3: Cross multiply
    15,841.70x = 21,862.65 × 8,768.58
  4. Step 4: Simplify right side
    15,841.70x = 191,704,395.54
  5. Step 5: Solve for x
    x = 191,704,395.54/15,841.70
  6. Step 6: Final answer
    x = 12,101.25

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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.