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Finding the Fourth Proportional to 12,410, 17,125.80 and 6,821.12

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Solution

The fourth proportional to 12,410, 17,125.80 and 6,821.12 is: 9,413.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,410 : 17,125.80 = 6,821.12 : x
  2. Step 2: Convert to fraction form
    12,410/17,125.80 = 6,821.12/x
  3. Step 3: Cross multiply
    12,410x = 17,125.80 × 6,821.12
  4. Step 4: Simplify right side
    12,410x = 116,817,136.90
  5. Step 5: Solve for x
    x = 116,817,136.90/12,410
  6. Step 6: Final answer
    x = 9,413.15

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Double scale
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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.