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Finding the Fourth Proportional to 43,852.05, 65,788.88 and 12,690.45

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Solution

The fourth proportional to 43,852.05, 65,788.88 and 12,690.45 is: 19,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,852.05 : 65,788.88 = 12,690.45 : x
  2. Step 2: Convert to fraction form
    43,852.05/65,788.88 = 12,690.45/x
  3. Step 3: Cross multiply
    43,852.05x = 65,788.88 × 12,690.45
  4. Step 4: Simplify right side
    43,852.05x = 834,890,428.74
  5. Step 5: Solve for x
    x = 834,890,428.74/43,852.05
  6. Step 6: Final answer
    x = 19,038.80

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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.