Home / 21,287.08-29,370.90-11,853.28

Finding the Fourth Proportional to 21,287.08, 29,370.90 and 11,853.28

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Solution

The fourth proportional to 21,287.08, 29,370.90 and 11,853.28 is: 16,354.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.08 : 29,370.90 = 11,853.28 : x
  2. Step 2: Convert to fraction form
    21,287.08/29,370.90 = 11,853.28/x
  3. Step 3: Cross multiply
    21,287.08x = 29,370.90 × 11,853.28
  4. Step 4: Simplify right side
    21,287.08x = 348,141,501.55
  5. Step 5: Solve for x
    x = 348,141,501.55/21,287.08
  6. Step 6: Final answer
    x = 16,354.59

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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.