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Finding the Fourth Proportional to 10,000.92, 15,005.70 and 5,611.80

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Solution

The fourth proportional to 10,000.92, 15,005.70 and 5,611.80 is: 8,420.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,000.92 : 15,005.70 = 5,611.80 : x
  2. Step 2: Convert to fraction form
    10,000.92/15,005.70 = 5,611.80/x
  3. Step 3: Cross multiply
    10,000.92x = 15,005.70 × 5,611.80
  4. Step 4: Simplify right side
    10,000.92x = 84,208,987.26
  5. Step 5: Solve for x
    x = 84,208,987.26/10,000.92
  6. Step 6: Final answer
    x = 8,420.12

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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.