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Finding the Fourth Proportional to 12,739.43, 17,580.29 and 7,074.03

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Solution

The fourth proportional to 12,739.43, 17,580.29 and 7,074.03 is: 9,762.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.43 : 17,580.29 = 7,074.03 : x
  2. Step 2: Convert to fraction form
    12,739.43/17,580.29 = 7,074.03/x
  3. Step 3: Cross multiply
    12,739.43x = 17,580.29 × 7,074.03
  4. Step 4: Simplify right side
    12,739.43x = 124,363,569.22
  5. Step 5: Solve for x
    x = 124,363,569.22/12,739.43
  6. Step 6: Final answer
    x = 9,762.10

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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.