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Finding the Fourth Proportional to 28,463.33, 42,688.62 and 8,742.08

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Solution

The fourth proportional to 28,463.33, 42,688.62 and 8,742.08 is: 13,111.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,463.33 : 42,688.62 = 8,742.08 : x
  2. Step 2: Convert to fraction form
    28,463.33/42,688.62 = 8,742.08/x
  3. Step 3: Cross multiply
    28,463.33x = 42,688.62 × 8,742.08
  4. Step 4: Simplify right side
    28,463.33x = 373,187,331.13
  5. Step 5: Solve for x
    x = 373,187,331.13/28,463.33
  6. Step 6: Final answer
    x = 13,111.16

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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.