Home / 12,513.08-18,769.08-5,115.08

Finding the Fourth Proportional to 12,513.08, 18,769.08 and 5,115.08

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Solution

The fourth proportional to 12,513.08, 18,769.08 and 5,115.08 is: 7,672.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,513.08 : 18,769.08 = 5,115.08 : x
  2. Step 2: Convert to fraction form
    12,513.08/18,769.08 = 5,115.08/x
  3. Step 3: Cross multiply
    12,513.08x = 18,769.08 × 5,115.08
  4. Step 4: Simplify right side
    12,513.08x = 96,005,345.73
  5. Step 5: Solve for x
    x = 96,005,345.73/12,513.08
  6. Step 6: Final answer
    x = 7,672.40

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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.