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Finding the Fourth Proportional to 15,740.08, 21,721.08 and 8,666.32

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Solution

The fourth proportional to 15,740.08, 21,721.08 and 8,666.32 is: 11,959.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,740.08 : 21,721.08 = 8,666.32 : x
  2. Step 2: Convert to fraction form
    15,740.08/21,721.08 = 8,666.32/x
  3. Step 3: Cross multiply
    15,740.08x = 21,721.08 × 8,666.32
  4. Step 4: Simplify right side
    15,740.08x = 188,241,830.03
  5. Step 5: Solve for x
    x = 188,241,830.03/15,740.08
  6. Step 6: Final answer
    x = 11,959.39

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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.