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Finding the Fourth Proportional to 15,555.80, 21,467.04 and 8,841.47

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Solution

The fourth proportional to 15,555.80, 21,467.04 and 8,841.47 is: 12,201.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,555.80 : 21,467.04 = 8,841.47 : x
  2. Step 2: Convert to fraction form
    15,555.80/21,467.04 = 8,841.47/x
  3. Step 3: Cross multiply
    15,555.80x = 21,467.04 × 8,841.47
  4. Step 4: Simplify right side
    15,555.80x = 189,800,082.81
  5. Step 5: Solve for x
    x = 189,800,082.81/15,555.80
  6. Step 6: Final answer
    x = 12,201.25

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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.