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Finding the Fourth Proportional to 9,987.70, 14,981.55 and 7,071.70

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Solution

The fourth proportional to 9,987.70, 14,981.55 and 7,071.70 is: 10,607.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,987.70 : 14,981.55 = 7,071.70 : x
  2. Step 2: Convert to fraction form
    9,987.70/14,981.55 = 7,071.70/x
  3. Step 3: Cross multiply
    9,987.70x = 14,981.55 × 7,071.70
  4. Step 4: Simplify right side
    9,987.70x = 105,945,027.14
  5. Step 5: Solve for x
    x = 105,945,027.14/9,987.70
  6. Step 6: Final answer
    x = 10,607.55

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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.