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Finding the Fourth Proportional to 12,993.53, 17,929.80 and 7,329.16

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Solution

The fourth proportional to 12,993.53, 17,929.80 and 7,329.16 is: 10,113.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,993.53 : 17,929.80 = 7,329.16 : x
  2. Step 2: Convert to fraction form
    12,993.53/17,929.80 = 7,329.16/x
  3. Step 3: Cross multiply
    12,993.53x = 17,929.80 × 7,329.16
  4. Step 4: Simplify right side
    12,993.53x = 131,410,328.14
  5. Step 5: Solve for x
    x = 131,410,328.14/12,993.53
  6. Step 6: Final answer
    x = 10,113.52

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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.