Home / 12,685.16-18,999.86-10,458.90

Finding the Fourth Proportional to 12,685.16, 18,999.86 and 10,458.90

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Solution

The fourth proportional to 12,685.16, 18,999.86 and 10,458.90 is: 15,665.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.16 : 18,999.86 = 10,458.90 : x
  2. Step 2: Convert to fraction form
    12,685.16/18,999.86 = 10,458.90/x
  3. Step 3: Cross multiply
    12,685.16x = 18,999.86 × 10,458.90
  4. Step 4: Simplify right side
    12,685.16x = 198,717,658.16
  5. Step 5: Solve for x
    x = 198,717,658.16/12,685.16
  6. Step 6: Final answer
    x = 15,665.37

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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.