Home / 21,750.30-30,015.41-12,318.86

Finding the Fourth Proportional to 21,750.30, 30,015.41 and 12,318.86

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Solution

The fourth proportional to 21,750.30, 30,015.41 and 12,318.86 is: 17,000.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.30 : 30,015.41 = 12,318.86 : x
  2. Step 2: Convert to fraction form
    21,750.30/30,015.41 = 12,318.86/x
  3. Step 3: Cross multiply
    21,750.30x = 30,015.41 × 12,318.86
  4. Step 4: Simplify right side
    21,750.30x = 369,755,633.63
  5. Step 5: Solve for x
    x = 369,755,633.63/21,750.30
  6. Step 6: Final answer
    x = 17,000.02

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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.