Home / 8,612.48-12,920.16-3,418.40

Finding the Fourth Proportional to 8,612.48, 12,920.16 and 3,418.40

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Solution

The fourth proportional to 8,612.48, 12,920.16 and 3,418.40 is: 5,128.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.48 : 12,920.16 = 3,418.40 : x
  2. Step 2: Convert to fraction form
    8,612.48/12,920.16 = 3,418.40/x
  3. Step 3: Cross multiply
    8,612.48x = 12,920.16 × 3,418.40
  4. Step 4: Simplify right side
    8,612.48x = 44,166,274.94
  5. Step 5: Solve for x
    x = 44,166,274.94/8,612.48
  6. Step 6: Final answer
    x = 5,128.17

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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.