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Finding the Fourth Proportional to 12,690.52, 17,501.28 and 10,897.39

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Solution

The fourth proportional to 12,690.52, 17,501.28 and 10,897.39 is: 15,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.52 : 17,501.28 = 10,897.39 : x
  2. Step 2: Convert to fraction form
    12,690.52/17,501.28 = 10,897.39/x
  3. Step 3: Cross multiply
    12,690.52x = 17,501.28 × 10,897.39
  4. Step 4: Simplify right side
    12,690.52x = 190,718,273.66
  5. Step 5: Solve for x
    x = 190,718,273.66/12,690.52
  6. Step 6: Final answer
    x = 15,028.40

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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.