Home / 15,847.89-21,870.39-9,132.39

Finding the Fourth Proportional to 15,847.89, 21,870.39 and 9,132.39

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Solution

The fourth proportional to 15,847.89, 21,870.39 and 9,132.39 is: 12,602.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,847.89 : 21,870.39 = 9,132.39 : x
  2. Step 2: Convert to fraction form
    15,847.89/21,870.39 = 9,132.39/x
  3. Step 3: Cross multiply
    15,847.89x = 21,870.39 × 9,132.39
  4. Step 4: Simplify right side
    15,847.89x = 199,728,930.93
  5. Step 5: Solve for x
    x = 199,728,930.93/15,847.89
  6. Step 6: Final answer
    x = 12,602.87

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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.