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Finding the Fourth Proportional to 12,903.88, 17,806.72 and 7,237.92

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Solution

The fourth proportional to 12,903.88, 17,806.72 and 7,237.92 is: 9,987.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,903.88 : 17,806.72 = 7,237.92 : x
  2. Step 2: Convert to fraction form
    12,903.88/17,806.72 = 7,237.92/x
  3. Step 3: Cross multiply
    12,903.88x = 17,806.72 × 7,237.92
  4. Step 4: Simplify right side
    12,903.88x = 128,883,614.82
  5. Step 5: Solve for x
    x = 128,883,614.82/12,903.88
  6. Step 6: Final answer
    x = 9,987.97

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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.