Home / 21,431.93-29,571.28-12,935.43

Finding the Fourth Proportional to 21,431.93, 29,571.28 and 12,935.43

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Solution

The fourth proportional to 21,431.93, 29,571.28 and 12,935.43 is: 17,848.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.93 : 29,571.28 = 12,935.43 : x
  2. Step 2: Convert to fraction form
    21,431.93/29,571.28 = 12,935.43/x
  3. Step 3: Cross multiply
    21,431.93x = 29,571.28 × 12,935.43
  4. Step 4: Simplify right side
    21,431.93x = 382,517,222.45
  5. Step 5: Solve for x
    x = 382,517,222.45/21,431.93
  6. Step 6: Final answer
    x = 17,848.01

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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.