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Finding the Fourth Proportional to 42,396.84, 63,580.50 and 12,403.08

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Solution

The fourth proportional to 42,396.84, 63,580.50 and 12,403.08 is: 18,600.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,396.84 : 63,580.50 = 12,403.08 : x
  2. Step 2: Convert to fraction form
    42,396.84/63,580.50 = 12,403.08/x
  3. Step 3: Cross multiply
    42,396.84x = 63,580.50 × 12,403.08
  4. Step 4: Simplify right side
    42,396.84x = 788,594,027.94
  5. Step 5: Solve for x
    x = 788,594,027.94/42,396.84
  6. Step 6: Final answer
    x = 18,600.30

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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.