Home / 15,397.82-21,247.36-8,684.47

Finding the Fourth Proportional to 15,397.82, 21,247.36 and 8,684.47

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Solution

The fourth proportional to 15,397.82, 21,247.36 and 8,684.47 is: 11,983.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,397.82 : 21,247.36 = 8,684.47 : x
  2. Step 2: Convert to fraction form
    15,397.82/21,247.36 = 8,684.47/x
  3. Step 3: Cross multiply
    15,397.82x = 21,247.36 × 8,684.47
  4. Step 4: Simplify right side
    15,397.82x = 184,522,060.50
  5. Step 5: Solve for x
    x = 184,522,060.50/15,397.82
  6. Step 6: Final answer
    x = 11,983.65

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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.