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Finding the Fourth Proportional to 12,995.76, 17,933.76 and 8,281.56

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Solution

The fourth proportional to 12,995.76, 17,933.76 and 8,281.56 is: 11,428.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,995.76 : 17,933.76 = 8,281.56 : x
  2. Step 2: Convert to fraction form
    12,995.76/17,933.76 = 8,281.56/x
  3. Step 3: Cross multiply
    12,995.76x = 17,933.76 × 8,281.56
  4. Step 4: Simplify right side
    12,995.76x = 148,519,509.47
  5. Step 5: Solve for x
    x = 148,519,509.47/12,995.76
  6. Step 6: Final answer
    x = 11,428.31

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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.