Home / 21,315.83-29,388.47-14,589.90

Finding the Fourth Proportional to 21,315.83, 29,388.47 and 14,589.90

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Solution

The fourth proportional to 21,315.83, 29,388.47 and 14,589.90 is: 20,115.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.83 : 29,388.47 = 14,589.90 : x
  2. Step 2: Convert to fraction form
    21,315.83/29,388.47 = 14,589.90/x
  3. Step 3: Cross multiply
    21,315.83x = 29,388.47 × 14,589.90
  4. Step 4: Simplify right side
    21,315.83x = 428,774,765.50
  5. Step 5: Solve for x
    x = 428,774,765.50/21,315.83
  6. Step 6: Final answer
    x = 20,115.33

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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.