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Finding the Fourth Proportional to 30,951, 42,713.14 and 19,007.56

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Solution

The fourth proportional to 30,951, 42,713.14 and 19,007.56 is: 26,230.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,951 : 42,713.14 = 19,007.56 : x
  2. Step 2: Convert to fraction form
    30,951/42,713.14 = 19,007.56/x
  3. Step 3: Cross multiply
    30,951x = 42,713.14 × 19,007.56
  4. Step 4: Simplify right side
    30,951x = 811,872,571.34
  5. Step 5: Solve for x
    x = 811,872,571.34/30,951
  6. Step 6: Final answer
    x = 26,230.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.