Home / 12,210.85-16,851.32-6,905.55

Finding the Fourth Proportional to 12,210.85, 16,851.32 and 6,905.55

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Solution

The fourth proportional to 12,210.85, 16,851.32 and 6,905.55 is: 9,529.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.85 : 16,851.32 = 6,905.55 : x
  2. Step 2: Convert to fraction form
    12,210.85/16,851.32 = 6,905.55/x
  3. Step 3: Cross multiply
    12,210.85x = 16,851.32 × 6,905.55
  4. Step 4: Simplify right side
    12,210.85x = 116,367,632.83
  5. Step 5: Solve for x
    x = 116,367,632.83/12,210.85
  6. Step 6: Final answer
    x = 9,529.86

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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.