Home / 14,949.70-20,631.60-9,905.20

Finding the Fourth Proportional to 14,949.70, 20,631.60 and 9,905.20

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Solution

The fourth proportional to 14,949.70, 20,631.60 and 9,905.20 is: 13,669.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,949.70 : 20,631.60 = 9,905.20 : x
  2. Step 2: Convert to fraction form
    14,949.70/20,631.60 = 9,905.20/x
  3. Step 3: Cross multiply
    14,949.70x = 20,631.60 × 9,905.20
  4. Step 4: Simplify right side
    14,949.70x = 204,360,124.32
  5. Step 5: Solve for x
    x = 204,360,124.32/14,949.70
  6. Step 6: Final answer
    x = 13,669.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.