Home / 12,637.44-17,430.96-9,980.64

Finding the Fourth Proportional to 12,637.44, 17,430.96 and 9,980.64

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Solution

The fourth proportional to 12,637.44, 17,430.96 and 9,980.64 is: 13,766.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,637.44 : 17,430.96 = 9,980.64 : x
  2. Step 2: Convert to fraction form
    12,637.44/17,430.96 = 9,980.64/x
  3. Step 3: Cross multiply
    12,637.44x = 17,430.96 × 9,980.64
  4. Step 4: Simplify right side
    12,637.44x = 173,972,136.61
  5. Step 5: Solve for x
    x = 173,972,136.61/12,637.44
  6. Step 6: Final answer
    x = 13,766.41

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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.