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Finding the Fourth Proportional to 20,706.60, 31,059.90 and 10,848.90

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Solution

The fourth proportional to 20,706.60, 31,059.90 and 10,848.90 is: 16,273.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.60 : 31,059.90 = 10,848.90 : x
  2. Step 2: Convert to fraction form
    20,706.60/31,059.90 = 10,848.90/x
  3. Step 3: Cross multiply
    20,706.60x = 31,059.90 × 10,848.90
  4. Step 4: Simplify right side
    20,706.60x = 336,965,749.11
  5. Step 5: Solve for x
    x = 336,965,749.11/20,706.60
  6. Step 6: Final answer
    x = 16,273.35

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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.