Home / 12,785.40-17,638.80-9,436.20

Finding the Fourth Proportional to 12,785.40, 17,638.80 and 9,436.20

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Solution

The fourth proportional to 12,785.40, 17,638.80 and 9,436.20 is: 13,018.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,785.40 : 17,638.80 = 9,436.20 : x
  2. Step 2: Convert to fraction form
    12,785.40/17,638.80 = 9,436.20/x
  3. Step 3: Cross multiply
    12,785.40x = 17,638.80 × 9,436.20
  4. Step 4: Simplify right side
    12,785.40x = 166,443,244.56
  5. Step 5: Solve for x
    x = 166,443,244.56/12,785.40
  6. Step 6: Final answer
    x = 13,018.23

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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.