Home / 21,817.28-30,108.48-12,385.52

Finding the Fourth Proportional to 21,817.28, 30,108.48 and 12,385.52

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Solution

The fourth proportional to 21,817.28, 30,108.48 and 12,385.52 is: 17,092.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,817.28 : 30,108.48 = 12,385.52 : x
  2. Step 2: Convert to fraction form
    21,817.28/30,108.48 = 12,385.52/x
  3. Step 3: Cross multiply
    21,817.28x = 30,108.48 × 12,385.52
  4. Step 4: Simplify right side
    21,817.28x = 372,909,181.21
  5. Step 5: Solve for x
    x = 372,909,181.21/21,817.28
  6. Step 6: Final answer
    x = 17,092.38

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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.