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Finding the Fourth Proportional to 58,321.08, 87,460.11 and 20,871

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Solution

The fourth proportional to 58,321.08, 87,460.11 and 20,871 is: 31,298.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,321.08 : 87,460.11 = 20,871 : x
  2. Step 2: Convert to fraction form
    58,321.08/87,460.11 = 20,871/x
  3. Step 3: Cross multiply
    58,321.08x = 87,460.11 × 20,871
  4. Step 4: Simplify right side
    58,321.08x = 1,825,379,955.81
  5. Step 5: Solve for x
    x = 1,825,379,955.81/58,321.08
  6. Step 6: Final answer
    x = 31,298.80

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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.