Home / 12,980.16-19,467.36-5,186.88

Finding the Fourth Proportional to 12,980.16, 19,467.36 and 5,186.88

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Solution

The fourth proportional to 12,980.16, 19,467.36 and 5,186.88 is: 7,779.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.16 : 19,467.36 = 5,186.88 : x
  2. Step 2: Convert to fraction form
    12,980.16/19,467.36 = 5,186.88/x
  3. Step 3: Cross multiply
    12,980.16x = 19,467.36 × 5,186.88
  4. Step 4: Simplify right side
    12,980.16x = 100,974,860.24
  5. Step 5: Solve for x
    x = 100,974,860.24/12,980.16
  6. Step 6: Final answer
    x = 7,779.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.