Home / 21,852.17-30,154.79-12,896.40

Finding the Fourth Proportional to 21,852.17, 30,154.79 and 12,896.40

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Solution

The fourth proportional to 21,852.17, 30,154.79 and 12,896.40 is: 17,796.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,852.17 : 30,154.79 = 12,896.40 : x
  2. Step 2: Convert to fraction form
    21,852.17/30,154.79 = 12,896.40/x
  3. Step 3: Cross multiply
    21,852.17x = 30,154.79 × 12,896.40
  4. Step 4: Simplify right side
    21,852.17x = 388,888,233.76
  5. Step 5: Solve for x
    x = 388,888,233.76/21,852.17
  6. Step 6: Final answer
    x = 17,796.32

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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.