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Finding the Fourth Proportional to 12,690.66, 19,036.52 and 3,925.74

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Solution

The fourth proportional to 12,690.66, 19,036.52 and 3,925.74 is: 5,888.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.66 : 19,036.52 = 3,925.74 : x
  2. Step 2: Convert to fraction form
    12,690.66/19,036.52 = 3,925.74/x
  3. Step 3: Cross multiply
    12,690.66x = 19,036.52 × 3,925.74
  4. Step 4: Simplify right side
    12,690.66x = 74,732,428.02
  5. Step 5: Solve for x
    x = 74,732,428.02/12,690.66
  6. Step 6: Final answer
    x = 5,888.77

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.