Home / 21,639.12-29,855-12,077.48

Finding the Fourth Proportional to 21,639.12, 29,855 and 12,077.48

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Solution

The fourth proportional to 21,639.12, 29,855 and 12,077.48 is: 16,663.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.12 : 29,855 = 12,077.48 : x
  2. Step 2: Convert to fraction form
    21,639.12/29,855 = 12,077.48/x
  3. Step 3: Cross multiply
    21,639.12x = 29,855 × 12,077.48
  4. Step 4: Simplify right side
    21,639.12x = 360,573,165.40
  5. Step 5: Solve for x
    x = 360,573,165.40/21,639.12
  6. Step 6: Final answer
    x = 16,663.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.