Home / 13,821.12-20,731.71-8,254.46

Finding the Fourth Proportional to 13,821.12, 20,731.71 and 8,254.46

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Solution

The fourth proportional to 13,821.12, 20,731.71 and 8,254.46 is: 12,381.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,821.12 : 20,731.71 = 8,254.46 : x
  2. Step 2: Convert to fraction form
    13,821.12/20,731.71 = 8,254.46/x
  3. Step 3: Cross multiply
    13,821.12x = 20,731.71 × 8,254.46
  4. Step 4: Simplify right side
    13,821.12x = 171,128,967.27
  5. Step 5: Solve for x
    x = 171,128,967.27/13,821.12
  6. Step 6: Final answer
    x = 12,381.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.