Home / 21,431.28-29,577.32-12,356.88

Finding the Fourth Proportional to 21,431.28, 29,577.32 and 12,356.88

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Solution

The fourth proportional to 21,431.28, 29,577.32 and 12,356.88 is: 17,053.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.28 : 29,577.32 = 12,356.88 : x
  2. Step 2: Convert to fraction form
    21,431.28/29,577.32 = 12,356.88/x
  3. Step 3: Cross multiply
    21,431.28x = 29,577.32 × 12,356.88
  4. Step 4: Simplify right side
    21,431.28x = 365,483,393.96
  5. Step 5: Solve for x
    x = 365,483,393.96/21,431.28
  6. Step 6: Final answer
    x = 17,053.74

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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.