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Finding the Fourth Proportional to 10,905.70, 16,358.55 and 7,953.70

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Solution

The fourth proportional to 10,905.70, 16,358.55 and 7,953.70 is: 11,930.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.70 : 16,358.55 = 7,953.70 : x
  2. Step 2: Convert to fraction form
    10,905.70/16,358.55 = 7,953.70/x
  3. Step 3: Cross multiply
    10,905.70x = 16,358.55 × 7,953.70
  4. Step 4: Simplify right side
    10,905.70x = 130,110,999.14
  5. Step 5: Solve for x
    x = 130,110,999.14/10,905.70
  6. Step 6: Final answer
    x = 11,930.55

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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.