Home / 21,024-31,540.32-8,712

Finding the Fourth Proportional to 21,024, 31,540.32 and 8,712

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Solution

The fourth proportional to 21,024, 31,540.32 and 8,712 is: 13,069.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,024 : 31,540.32 = 8,712 : x
  2. Step 2: Convert to fraction form
    21,024/31,540.32 = 8,712/x
  3. Step 3: Cross multiply
    21,024x = 31,540.32 × 8,712
  4. Step 4: Simplify right side
    21,024x = 274,779,267.84
  5. Step 5: Solve for x
    x = 274,779,267.84/21,024
  6. Step 6: Final answer
    x = 13,069.79

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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.