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Finding the Fourth Proportional to 12,918.52, 19,361.53 and 6,995.17

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Solution

The fourth proportional to 12,918.52, 19,361.53 and 6,995.17 is: 10,483.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.52 : 19,361.53 = 6,995.17 : x
  2. Step 2: Convert to fraction form
    12,918.52/19,361.53 = 6,995.17/x
  3. Step 3: Cross multiply
    12,918.52x = 19,361.53 × 6,995.17
  4. Step 4: Simplify right side
    12,918.52x = 135,437,193.81
  5. Step 5: Solve for x
    x = 135,437,193.81/12,918.52
  6. Step 6: Final answer
    x = 10,483.96

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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.