Home / 12,210.75-16,851.20-6,905.46

Finding the Fourth Proportional to 12,210.75, 16,851.20 and 6,905.46

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Solution

The fourth proportional to 12,210.75, 16,851.20 and 6,905.46 is: 9,529.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.75 : 16,851.20 = 6,905.46 : x
  2. Step 2: Convert to fraction form
    12,210.75/16,851.20 = 6,905.46/x
  3. Step 3: Cross multiply
    12,210.75x = 16,851.20 × 6,905.46
  4. Step 4: Simplify right side
    12,210.75x = 116,365,287.55
  5. Step 5: Solve for x
    x = 116,365,287.55/12,210.75
  6. Step 6: Final answer
    x = 9,529.74

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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.