Home / 21,234.72-29,295.74-13,680.48

Finding the Fourth Proportional to 21,234.72, 29,295.74 and 13,680.48

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Solution

The fourth proportional to 21,234.72, 29,295.74 and 13,680.48 is: 18,873.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,234.72 : 29,295.74 = 13,680.48 : x
  2. Step 2: Convert to fraction form
    21,234.72/29,295.74 = 13,680.48/x
  3. Step 3: Cross multiply
    21,234.72x = 29,295.74 × 13,680.48
  4. Step 4: Simplify right side
    21,234.72x = 400,779,785.16
  5. Step 5: Solve for x
    x = 400,779,785.16/21,234.72
  6. Step 6: Final answer
    x = 18,873.80

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1.5x scale

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.