Home / 12,685.06-18,999.85-6,434.30

Finding the Fourth Proportional to 12,685.06, 18,999.85 and 6,434.30

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Solution

The fourth proportional to 12,685.06, 18,999.85 and 6,434.30 is: 9,637.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.06 : 18,999.85 = 6,434.30 : x
  2. Step 2: Convert to fraction form
    12,685.06/18,999.85 = 6,434.30/x
  3. Step 3: Cross multiply
    12,685.06x = 18,999.85 × 6,434.30
  4. Step 4: Simplify right side
    12,685.06x = 122,250,734.86
  5. Step 5: Solve for x
    x = 122,250,734.86/12,685.06
  6. Step 6: Final answer
    x = 9,637.38

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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.