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Finding the Fourth Proportional to 20,335.34, 30,510.51 and 8,490.34

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Solution

The fourth proportional to 20,335.34, 30,510.51 and 8,490.34 is: 12,738.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.34 : 30,510.51 = 8,490.34 : x
  2. Step 2: Convert to fraction form
    20,335.34/30,510.51 = 8,490.34/x
  3. Step 3: Cross multiply
    20,335.34x = 30,510.51 × 8,490.34
  4. Step 4: Simplify right side
    20,335.34x = 259,044,731.40
  5. Step 5: Solve for x
    x = 259,044,731.40/20,335.34
  6. Step 6: Final answer
    x = 12,738.65

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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.