Home / 12,979.66-17,910.85-7,312.60

Finding the Fourth Proportional to 12,979.66, 17,910.85 and 7,312.60

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Solution

The fourth proportional to 12,979.66, 17,910.85 and 7,312.60 is: 10,090.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.66 : 17,910.85 = 7,312.60 : x
  2. Step 2: Convert to fraction form
    12,979.66/17,910.85 = 7,312.60/x
  3. Step 3: Cross multiply
    12,979.66x = 17,910.85 × 7,312.60
  4. Step 4: Simplify right side
    12,979.66x = 130,974,881.71
  5. Step 5: Solve for x
    x = 130,974,881.71/12,979.66
  6. Step 6: Final answer
    x = 10,090.78

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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.