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Finding the Fourth Proportional to 12,808.90, 19,176.90 and 12,444.40

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Solution

The fourth proportional to 12,808.90, 19,176.90 and 12,444.40 is: 18,631.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.90 : 19,176.90 = 12,444.40 : x
  2. Step 2: Convert to fraction form
    12,808.90/19,176.90 = 12,444.40/x
  3. Step 3: Cross multiply
    12,808.90x = 19,176.90 × 12,444.40
  4. Step 4: Simplify right side
    12,808.90x = 238,645,014.36
  5. Step 5: Solve for x
    x = 238,645,014.36/12,808.90
  6. Step 6: Final answer
    x = 18,631.19

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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.