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Finding the Fourth Proportional to 9,981.40, 14,972.10 and 9,495.40

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Solution

The fourth proportional to 9,981.40, 14,972.10 and 9,495.40 is: 14,243.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,981.40 : 14,972.10 = 9,495.40 : x
  2. Step 2: Convert to fraction form
    9,981.40/14,972.10 = 9,495.40/x
  3. Step 3: Cross multiply
    9,981.40x = 14,972.10 × 9,495.40
  4. Step 4: Simplify right side
    9,981.40x = 142,166,078.34
  5. Step 5: Solve for x
    x = 142,166,078.34/9,981.40
  6. Step 6: Final answer
    x = 14,243.10

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Double scale
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Similar ratio
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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.