Home / 12,939.23-17,855.88-8,158.20

Finding the Fourth Proportional to 12,939.23, 17,855.88 and 8,158.20

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Solution

The fourth proportional to 12,939.23, 17,855.88 and 8,158.20 is: 11,258.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.23 : 17,855.88 = 8,158.20 : x
  2. Step 2: Convert to fraction form
    12,939.23/17,855.88 = 8,158.20/x
  3. Step 3: Cross multiply
    12,939.23x = 17,855.88 × 8,158.20
  4. Step 4: Simplify right side
    12,939.23x = 145,671,840.22
  5. Step 5: Solve for x
    x = 145,671,840.22/12,939.23
  6. Step 6: Final answer
    x = 11,258.16

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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.