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Finding the Fourth Proportional to 12,762.92, 17,613.23 and 7,728.08

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Solution

The fourth proportional to 12,762.92, 17,613.23 and 7,728.08 is: 10,664.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,762.92 : 17,613.23 = 7,728.08 : x
  2. Step 2: Convert to fraction form
    12,762.92/17,613.23 = 7,728.08/x
  3. Step 3: Cross multiply
    12,762.92x = 17,613.23 × 7,728.08
  4. Step 4: Simplify right side
    12,762.92x = 136,116,323.79
  5. Step 5: Solve for x
    x = 136,116,323.79/12,762.92
  6. Step 6: Final answer
    x = 10,664.98

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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.