Home / 15,660.64-21,615.14-12,250.90

Finding the Fourth Proportional to 15,660.64, 21,615.14 and 12,250.90

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Solution

The fourth proportional to 15,660.64, 21,615.14 and 12,250.90 is: 16,908.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.64 : 21,615.14 = 12,250.90 : x
  2. Step 2: Convert to fraction form
    15,660.64/21,615.14 = 12,250.90/x
  3. Step 3: Cross multiply
    15,660.64x = 21,615.14 × 12,250.90
  4. Step 4: Simplify right side
    15,660.64x = 264,804,785.78
  5. Step 5: Solve for x
    x = 264,804,785.78/15,660.64
  6. Step 6: Final answer
    x = 16,908.94

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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.