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Finding the Fourth Proportional to 56,245.40, 84,376.20 and 18,807.20

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Solution

The fourth proportional to 56,245.40, 84,376.20 and 18,807.20 is: 28,213.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,245.40 : 84,376.20 = 18,807.20 : x
  2. Step 2: Convert to fraction form
    56,245.40/84,376.20 = 18,807.20/x
  3. Step 3: Cross multiply
    56,245.40x = 84,376.20 × 18,807.20
  4. Step 4: Simplify right side
    56,245.40x = 1,586,880,068.64
  5. Step 5: Solve for x
    x = 1,586,880,068.64/56,245.40
  6. Step 6: Final answer
    x = 28,213.51

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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.