Home / 21,354.89-29,467.49-12,400.65

Finding the Fourth Proportional to 21,354.89, 29,467.49 and 12,400.65

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Solution

The fourth proportional to 21,354.89, 29,467.49 and 12,400.65 is: 17,111.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,354.89 : 29,467.49 = 12,400.65 : x
  2. Step 2: Convert to fraction form
    21,354.89/29,467.49 = 12,400.65/x
  3. Step 3: Cross multiply
    21,354.89x = 29,467.49 × 12,400.65
  4. Step 4: Simplify right side
    21,354.89x = 365,415,967.87
  5. Step 5: Solve for x
    x = 365,415,967.87/21,354.89
  6. Step 6: Final answer
    x = 17,111.59

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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.