Home / 12,991.16-19,479.72-6,325.40

Finding the Fourth Proportional to 12,991.16, 19,479.72 and 6,325.40

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Solution

The fourth proportional to 12,991.16, 19,479.72 and 6,325.40 is: 9,484.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.16 : 19,479.72 = 6,325.40 : x
  2. Step 2: Convert to fraction form
    12,991.16/19,479.72 = 6,325.40/x
  3. Step 3: Cross multiply
    12,991.16x = 19,479.72 × 6,325.40
  4. Step 4: Simplify right side
    12,991.16x = 123,217,020.89
  5. Step 5: Solve for x
    x = 123,217,020.89/12,991.16
  6. Step 6: Final answer
    x = 9,484.68

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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.