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Finding the Fourth Proportional to 10,644.74, 15,953.40 and 9,980.44

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Solution

The fourth proportional to 10,644.74, 15,953.40 and 9,980.44 is: 14,957.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,644.74 : 15,953.40 = 9,980.44 : x
  2. Step 2: Convert to fraction form
    10,644.74/15,953.40 = 9,980.44/x
  3. Step 3: Cross multiply
    10,644.74x = 15,953.40 × 9,980.44
  4. Step 4: Simplify right side
    10,644.74x = 159,221,951.50
  5. Step 5: Solve for x
    x = 159,221,951.50/10,644.74
  6. Step 6: Final answer
    x = 14,957.81

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Half scale
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Double scale
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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.