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Finding the Fourth Proportional to 12,891.01, 17,798.16 and 9,901.50

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Solution

The fourth proportional to 12,891.01, 17,798.16 and 9,901.50 is: 13,670.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.01 : 17,798.16 = 9,901.50 : x
  2. Step 2: Convert to fraction form
    12,891.01/17,798.16 = 9,901.50/x
  3. Step 3: Cross multiply
    12,891.01x = 17,798.16 × 9,901.50
  4. Step 4: Simplify right side
    12,891.01x = 176,228,481.24
  5. Step 5: Solve for x
    x = 176,228,481.24/12,891.01
  6. Step 6: Final answer
    x = 13,670.65

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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.