Home / 12,911.16-19,370.08-4,479.40

Finding the Fourth Proportional to 12,911.16, 19,370.08 and 4,479.40

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Solution

The fourth proportional to 12,911.16, 19,370.08 and 4,479.40 is: 6,720.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.16 : 19,370.08 = 4,479.40 : x
  2. Step 2: Convert to fraction form
    12,911.16/19,370.08 = 4,479.40/x
  3. Step 3: Cross multiply
    12,911.16x = 19,370.08 × 4,479.40
  4. Step 4: Simplify right side
    12,911.16x = 86,766,336.35
  5. Step 5: Solve for x
    x = 86,766,336.35/12,911.16
  6. Step 6: Final answer
    x = 6,720.26

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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.