Home / 9,416.20-12,985.78-7,841.80

Finding the Fourth Proportional to 9,416.20, 12,985.78 and 7,841.80

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Solution

The fourth proportional to 9,416.20, 12,985.78 and 7,841.80 is: 10,814.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,416.20 : 12,985.78 = 7,841.80 : x
  2. Step 2: Convert to fraction form
    9,416.20/12,985.78 = 7,841.80/x
  3. Step 3: Cross multiply
    9,416.20x = 12,985.78 × 7,841.80
  4. Step 4: Simplify right side
    9,416.20x = 101,831,889.60
  5. Step 5: Solve for x
    x = 101,831,889.60/9,416.20
  6. Step 6: Final answer
    x = 10,814.54

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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.