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Finding the Fourth Proportional to 12,992.49, 17,929.77 and 7,024.28

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Solution

The fourth proportional to 12,992.49, 17,929.77 and 7,024.28 is: 9,693.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,992.49 : 17,929.77 = 7,024.28 : x
  2. Step 2: Convert to fraction form
    12,992.49/17,929.77 = 7,024.28/x
  3. Step 3: Cross multiply
    12,992.49x = 17,929.77 × 7,024.28
  4. Step 4: Simplify right side
    12,992.49x = 125,943,635.17
  5. Step 5: Solve for x
    x = 125,943,635.17/12,992.49
  6. Step 6: Final answer
    x = 9,693.57

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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.