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Finding the Fourth Proportional to 42,396.84, 63,629.82 and 21,626.28

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Solution

The fourth proportional to 42,396.84, 63,629.82 and 21,626.28 is: 32,457.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,396.84 : 63,629.82 = 21,626.28 : x
  2. Step 2: Convert to fraction form
    42,396.84/63,629.82 = 21,626.28/x
  3. Step 3: Cross multiply
    42,396.84x = 63,629.82 × 21,626.28
  4. Step 4: Simplify right side
    42,396.84x = 1,376,076,303.67
  5. Step 5: Solve for x
    x = 1,376,076,303.67/42,396.84
  6. Step 6: Final answer
    x = 32,457.05

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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.