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Finding the Fourth Proportional to 56,368.65, 84,560.75 and 18,939.42

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Solution

The fourth proportional to 56,368.65, 84,560.75 and 18,939.42 is: 28,411.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,368.65 : 84,560.75 = 18,939.42 : x
  2. Step 2: Convert to fraction form
    56,368.65/84,560.75 = 18,939.42/x
  3. Step 3: Cross multiply
    56,368.65x = 84,560.75 × 18,939.42
  4. Step 4: Simplify right side
    56,368.65x = 1,601,531,509.46
  5. Step 5: Solve for x
    x = 1,601,531,509.46/56,368.65
  6. Step 6: Final answer
    x = 28,411.74

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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.