Home / 15,012.21-20,718.60-12,489.87

Finding the Fourth Proportional to 15,012.21, 20,718.60 and 12,489.87

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Solution

The fourth proportional to 15,012.21, 20,718.60 and 12,489.87 is: 17,237.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.21 : 20,718.60 = 12,489.87 : x
  2. Step 2: Convert to fraction form
    15,012.21/20,718.60 = 12,489.87/x
  3. Step 3: Cross multiply
    15,012.21x = 20,718.60 × 12,489.87
  4. Step 4: Simplify right side
    15,012.21x = 258,772,620.58
  5. Step 5: Solve for x
    x = 258,772,620.58/15,012.21
  6. Step 6: Final answer
    x = 17,237.48

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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.