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Finding the Fourth Proportional to 20,747.60, 31,056.60 and 14,915.60

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Solution

The fourth proportional to 20,747.60, 31,056.60 and 14,915.60 is: 22,326.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.60 : 31,056.60 = 14,915.60 : x
  2. Step 2: Convert to fraction form
    20,747.60/31,056.60 = 14,915.60/x
  3. Step 3: Cross multiply
    20,747.60x = 31,056.60 × 14,915.60
  4. Step 4: Simplify right side
    20,747.60x = 463,227,822.96
  5. Step 5: Solve for x
    x = 463,227,822.96/20,747.60
  6. Step 6: Final answer
    x = 22,326.81

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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.