Home / 11,985.16-17,979.26-6,430.90

Finding the Fourth Proportional to 11,985.16, 17,979.26 and 6,430.90

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Solution

The fourth proportional to 11,985.16, 17,979.26 and 6,430.90 is: 9,647.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.16 : 17,979.26 = 6,430.90 : x
  2. Step 2: Convert to fraction form
    11,985.16/17,979.26 = 6,430.90/x
  3. Step 3: Cross multiply
    11,985.16x = 17,979.26 × 6,430.90
  4. Step 4: Simplify right side
    11,985.16x = 115,622,823.13
  5. Step 5: Solve for x
    x = 115,622,823.13/11,985.16
  6. Step 6: Final answer
    x = 9,647.17

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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.