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Finding the Fourth Proportional to 30,570.11, 42,180.90 and 18,468.15

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Solution

The fourth proportional to 30,570.11, 42,180.90 and 18,468.15 is: 25,482.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,570.11 : 42,180.90 = 18,468.15 : x
  2. Step 2: Convert to fraction form
    30,570.11/42,180.90 = 18,468.15/x
  3. Step 3: Cross multiply
    30,570.11x = 42,180.90 × 18,468.15
  4. Step 4: Simplify right side
    30,570.11x = 779,003,302.05
  5. Step 5: Solve for x
    x = 779,003,302.05/30,570.11
  6. Step 6: Final answer
    x = 25,482.52

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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.