Home / 9,115.60-12,579.40-5,136.72

Finding the Fourth Proportional to 9,115.60, 12,579.40 and 5,136.72

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Solution

The fourth proportional to 9,115.60, 12,579.40 and 5,136.72 is: 7,088.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.60 : 12,579.40 = 5,136.72 : x
  2. Step 2: Convert to fraction form
    9,115.60/12,579.40 = 5,136.72/x
  3. Step 3: Cross multiply
    9,115.60x = 12,579.40 × 5,136.72
  4. Step 4: Simplify right side
    9,115.60x = 64,616,855.57
  5. Step 5: Solve for x
    x = 64,616,855.57/9,115.60
  6. Step 6: Final answer
    x = 7,088.60

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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.