Home / 12,980.36-17,898.66-8,781.32

Finding the Fourth Proportional to 12,980.36, 17,898.66 and 8,781.32

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Solution

The fourth proportional to 12,980.36, 17,898.66 and 8,781.32 is: 12,108.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.36 : 17,898.66 = 8,781.32 : x
  2. Step 2: Convert to fraction form
    12,980.36/17,898.66 = 8,781.32/x
  3. Step 3: Cross multiply
    12,980.36x = 17,898.66 × 8,781.32
  4. Step 4: Simplify right side
    12,980.36x = 157,173,861.03
  5. Step 5: Solve for x
    x = 157,173,861.03/12,980.36
  6. Step 6: Final answer
    x = 12,108.59

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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.