Home / 12,758.28-17,615.19-7,980.30

Finding the Fourth Proportional to 12,758.28, 17,615.19 and 7,980.30

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Solution

The fourth proportional to 12,758.28, 17,615.19 and 7,980.30 is: 11,018.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,758.28 : 17,615.19 = 7,980.30 : x
  2. Step 2: Convert to fraction form
    12,758.28/17,615.19 = 7,980.30/x
  3. Step 3: Cross multiply
    12,758.28x = 17,615.19 × 7,980.30
  4. Step 4: Simplify right side
    12,758.28x = 140,574,500.76
  5. Step 5: Solve for x
    x = 140,574,500.76/12,758.28
  6. Step 6: Final answer
    x = 11,018.30

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Double scale
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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.