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Finding the Fourth Proportional to 12,784.70, 19,297.13 and 12,784.70

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Solution

The fourth proportional to 12,784.70, 19,297.13 and 12,784.70 is: 19,297.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,784.70 : 19,297.13 = 12,784.70 : x
  2. Step 2: Convert to fraction form
    12,784.70/19,297.13 = 12,784.70/x
  3. Step 3: Cross multiply
    12,784.70x = 19,297.13 × 12,784.70
  4. Step 4: Simplify right side
    12,784.70x = 246,707,857.50
  5. Step 5: Solve for x
    x = 246,707,857.50/12,784.70
  6. Step 6: Final answer
    x = 19,297.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.