Home / 21,822.60-30,114.12-12,390.96

Finding the Fourth Proportional to 21,822.60, 30,114.12 and 12,390.96

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Solution

The fourth proportional to 21,822.60, 30,114.12 and 12,390.96 is: 17,098.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,822.60 : 30,114.12 = 12,390.96 : x
  2. Step 2: Convert to fraction form
    21,822.60/30,114.12 = 12,390.96/x
  3. Step 3: Cross multiply
    21,822.60x = 30,114.12 × 12,390.96
  4. Step 4: Simplify right side
    21,822.60x = 373,142,856.36
  5. Step 5: Solve for x
    x = 373,142,856.36/21,822.60
  6. Step 6: Final answer
    x = 17,098.92

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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.