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Finding the Fourth Proportional to 12,613.64, 18,913.98 and 6,775.16

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Solution

The fourth proportional to 12,613.64, 18,913.98 and 6,775.16 is: 10,159.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,613.64 : 18,913.98 = 6,775.16 : x
  2. Step 2: Convert to fraction form
    12,613.64/18,913.98 = 6,775.16/x
  3. Step 3: Cross multiply
    12,613.64x = 18,913.98 × 6,775.16
  4. Step 4: Simplify right side
    12,613.64x = 128,145,206.86
  5. Step 5: Solve for x
    x = 128,145,206.86/12,613.64
  6. Step 6: Final answer
    x = 10,159.26

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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.