Home / 12,889.28-17,780.88-8,410.96

Finding the Fourth Proportional to 12,889.28, 17,780.88 and 8,410.96

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Solution

The fourth proportional to 12,889.28, 17,780.88 and 8,410.96 is: 11,603.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.28 : 17,780.88 = 8,410.96 : x
  2. Step 2: Convert to fraction form
    12,889.28/17,780.88 = 8,410.96/x
  3. Step 3: Cross multiply
    12,889.28x = 17,780.88 × 8,410.96
  4. Step 4: Simplify right side
    12,889.28x = 149,554,270.44
  5. Step 5: Solve for x
    x = 149,554,270.44/12,889.28
  6. Step 6: Final answer
    x = 11,603.00

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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.