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Finding the Fourth Proportional to 12,897.88, 17,797.94 and 7,155.48

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Solution

The fourth proportional to 12,897.88, 17,797.94 and 7,155.48 is: 9,873.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,897.88 : 17,797.94 = 7,155.48 : x
  2. Step 2: Convert to fraction form
    12,897.88/17,797.94 = 7,155.48/x
  3. Step 3: Cross multiply
    12,897.88x = 17,797.94 × 7,155.48
  4. Step 4: Simplify right side
    12,897.88x = 127,352,803.71
  5. Step 5: Solve for x
    x = 127,352,803.71/12,897.88
  6. Step 6: Final answer
    x = 9,873.93

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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.