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Finding the Fourth Proportional to 12,881.80, 17,777.78 and 7,217.03

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Solution

The fourth proportional to 12,881.80, 17,777.78 and 7,217.03 is: 9,960.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.80 : 17,777.78 = 7,217.03 : x
  2. Step 2: Convert to fraction form
    12,881.80/17,777.78 = 7,217.03/x
  3. Step 3: Cross multiply
    12,881.80x = 17,777.78 × 7,217.03
  4. Step 4: Simplify right side
    12,881.80x = 128,302,807.02
  5. Step 5: Solve for x
    x = 128,302,807.02/12,881.80
  6. Step 6: Final answer
    x = 9,960.01

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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.