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Finding the Fourth Proportional to 12,980.35, 19,485.94 and 10,925.92

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Solution

The fourth proportional to 12,980.35, 19,485.94 and 10,925.92 is: 16,401.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.35 : 19,485.94 = 10,925.92 : x
  2. Step 2: Convert to fraction form
    12,980.35/19,485.94 = 10,925.92/x
  3. Step 3: Cross multiply
    12,980.35x = 19,485.94 × 10,925.92
  4. Step 4: Simplify right side
    12,980.35x = 212,901,724.14
  5. Step 5: Solve for x
    x = 212,901,724.14/12,980.35
  6. Step 6: Final answer
    x = 16,401.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.