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Finding the Fourth Proportional to 12,762.03, 17,611.76 and 7,172.91

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Solution

The fourth proportional to 12,762.03, 17,611.76 and 7,172.91 is: 9,898.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,762.03 : 17,611.76 = 7,172.91 : x
  2. Step 2: Convert to fraction form
    12,762.03/17,611.76 = 7,172.91/x
  3. Step 3: Cross multiply
    12,762.03x = 17,611.76 × 7,172.91
  4. Step 4: Simplify right side
    12,762.03x = 126,327,533.56
  5. Step 5: Solve for x
    x = 126,327,533.56/12,762.03
  6. Step 6: Final answer
    x = 9,898.70

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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.