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Finding the Fourth Proportional to 12,690.39, 19,041.03 and 4,904.67

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Solution

The fourth proportional to 12,690.39, 19,041.03 and 4,904.67 is: 7,359.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.39 : 19,041.03 = 4,904.67 : x
  2. Step 2: Convert to fraction form
    12,690.39/19,041.03 = 4,904.67/x
  3. Step 3: Cross multiply
    12,690.39x = 19,041.03 × 4,904.67
  4. Step 4: Simplify right side
    12,690.39x = 93,389,968.61
  5. Step 5: Solve for x
    x = 93,389,968.61/12,690.39
  6. Step 6: Final answer
    x = 7,359.11

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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.