Home / 12,117.12-16,720.78-6,812.72

Finding the Fourth Proportional to 12,117.12, 16,720.78 and 6,812.72

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Solution

The fourth proportional to 12,117.12, 16,720.78 and 6,812.72 is: 9,401.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,117.12 : 16,720.78 = 6,812.72 : x
  2. Step 2: Convert to fraction form
    12,117.12/16,720.78 = 6,812.72/x
  3. Step 3: Cross multiply
    12,117.12x = 16,720.78 × 6,812.72
  4. Step 4: Simplify right side
    12,117.12x = 113,913,992.32
  5. Step 5: Solve for x
    x = 113,913,992.32/12,117.12
  6. Step 6: Final answer
    x = 9,401.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.