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Finding the Fourth Proportional to 12,613.10, 18,919.65 and 5,858.01

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Solution

The fourth proportional to 12,613.10, 18,919.65 and 5,858.01 is: 8,787.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,613.10 : 18,919.65 = 5,858.01 : x
  2. Step 2: Convert to fraction form
    12,613.10/18,919.65 = 5,858.01/x
  3. Step 3: Cross multiply
    12,613.10x = 18,919.65 × 5,858.01
  4. Step 4: Simplify right side
    12,613.10x = 110,831,498.90
  5. Step 5: Solve for x
    x = 110,831,498.90/12,613.10
  6. Step 6: Final answer
    x = 8,787.02

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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.