Home / 15,754.08-21,740.40-8,680.32

Finding the Fourth Proportional to 15,754.08, 21,740.40 and 8,680.32

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Solution

The fourth proportional to 15,754.08, 21,740.40 and 8,680.32 is: 11,978.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,754.08 : 21,740.40 = 8,680.32 : x
  2. Step 2: Convert to fraction form
    15,754.08/21,740.40 = 8,680.32/x
  3. Step 3: Cross multiply
    15,754.08x = 21,740.40 × 8,680.32
  4. Step 4: Simplify right side
    15,754.08x = 188,713,628.93
  5. Step 5: Solve for x
    x = 188,713,628.93/15,754.08
  6. Step 6: Final answer
    x = 11,978.71

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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.