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Finding the Fourth Proportional to 30,630.95, 42,277.43 and 19,307.15

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Solution

The fourth proportional to 30,630.95, 42,277.43 and 19,307.15 is: 26,648.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,630.95 : 42,277.43 = 19,307.15 : x
  2. Step 2: Convert to fraction form
    30,630.95/42,277.43 = 19,307.15/x
  3. Step 3: Cross multiply
    30,630.95x = 42,277.43 × 19,307.15
  4. Step 4: Simplify right side
    30,630.95x = 816,256,586.09
  5. Step 5: Solve for x
    x = 816,256,586.09/30,630.95
  6. Step 6: Final answer
    x = 26,648.10

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