Home / 8,405.20-12,599.60-3,136.36

Finding the Fourth Proportional to 8,405.20, 12,599.60 and 3,136.36

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Solution

The fourth proportional to 8,405.20, 12,599.60 and 3,136.36 is: 4,701.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.20 : 12,599.60 = 3,136.36 : x
  2. Step 2: Convert to fraction form
    8,405.20/12,599.60 = 3,136.36/x
  3. Step 3: Cross multiply
    8,405.20x = 12,599.60 × 3,136.36
  4. Step 4: Simplify right side
    8,405.20x = 39,516,881.46
  5. Step 5: Solve for x
    x = 39,516,881.46/8,405.20
  6. Step 6: Final answer
    x = 4,701.48

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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.