Home / 21,315.62-29,398.32-20,454.48

Finding the Fourth Proportional to 21,315.62, 29,398.32 and 20,454.48

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Solution

The fourth proportional to 21,315.62, 29,398.32 and 20,454.48 is: 28,210.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.62 : 29,398.32 = 20,454.48 : x
  2. Step 2: Convert to fraction form
    21,315.62/29,398.32 = 20,454.48/x
  3. Step 3: Cross multiply
    21,315.62x = 29,398.32 × 20,454.48
  4. Step 4: Simplify right side
    21,315.62x = 601,327,348.47
  5. Step 5: Solve for x
    x = 601,327,348.47/21,315.62
  6. Step 6: Final answer
    x = 28,210.64

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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.