Home / 12,147.06-18,189.60-9,685.47

Finding the Fourth Proportional to 12,147.06, 18,189.60 and 9,685.47

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Solution

The fourth proportional to 12,147.06, 18,189.60 and 9,685.47 is: 14,503.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.06 : 18,189.60 = 9,685.47 : x
  2. Step 2: Convert to fraction form
    12,147.06/18,189.60 = 9,685.47/x
  3. Step 3: Cross multiply
    12,147.06x = 18,189.60 × 9,685.47
  4. Step 4: Simplify right side
    12,147.06x = 176,174,825.11
  5. Step 5: Solve for x
    x = 176,174,825.11/12,147.06
  6. Step 6: Final answer
    x = 14,503.50

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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.