Home / 21,278.02-29,300.26-20,805.97

Finding the Fourth Proportional to 21,278.02, 29,300.26 and 20,805.97

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Solution

The fourth proportional to 21,278.02, 29,300.26 and 20,805.97 is: 28,650.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.02 : 29,300.26 = 20,805.97 : x
  2. Step 2: Convert to fraction form
    21,278.02/29,300.26 = 20,805.97/x
  3. Step 3: Cross multiply
    21,278.02x = 29,300.26 × 20,805.97
  4. Step 4: Simplify right side
    21,278.02x = 609,620,330.55
  5. Step 5: Solve for x
    x = 609,620,330.55/21,278.02
  6. Step 6: Final answer
    x = 28,650.24

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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.