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Finding the Fourth Proportional to 12,676.14, 19,019.07 and 8,931.51

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Solution

The fourth proportional to 12,676.14, 19,019.07 and 8,931.51 is: 13,400.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,676.14 : 19,019.07 = 8,931.51 : x
  2. Step 2: Convert to fraction form
    12,676.14/19,019.07 = 8,931.51/x
  3. Step 3: Cross multiply
    12,676.14x = 19,019.07 × 8,931.51
  4. Step 4: Simplify right side
    12,676.14x = 169,869,013.90
  5. Step 5: Solve for x
    x = 169,869,013.90/12,676.14
  6. Step 6: Final answer
    x = 13,400.69

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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.