Home / 21,143.20-31,714.80-12,373.60

Finding the Fourth Proportional to 21,143.20, 31,714.80 and 12,373.60

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Solution

The fourth proportional to 21,143.20, 31,714.80 and 12,373.60 is: 18,560.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.20 : 31,714.80 = 12,373.60 : x
  2. Step 2: Convert to fraction form
    21,143.20/31,714.80 = 12,373.60/x
  3. Step 3: Cross multiply
    21,143.20x = 31,714.80 × 12,373.60
  4. Step 4: Simplify right side
    21,143.20x = 392,426,249.28
  5. Step 5: Solve for x
    x = 392,426,249.28/21,143.20
  6. Step 6: Final answer
    x = 18,560.40

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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.