Home / 21,354.84-29,473.47-12,405.15

Finding the Fourth Proportional to 21,354.84, 29,473.47 and 12,405.15

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Solution

The fourth proportional to 21,354.84, 29,473.47 and 12,405.15 is: 17,121.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,354.84 : 29,473.47 = 12,405.15 : x
  2. Step 2: Convert to fraction form
    21,354.84/29,473.47 = 12,405.15/x
  3. Step 3: Cross multiply
    21,354.84x = 29,473.47 × 12,405.15
  4. Step 4: Simplify right side
    21,354.84x = 365,622,816.37
  5. Step 5: Solve for x
    x = 365,622,816.37/21,354.84
  6. Step 6: Final answer
    x = 17,121.31

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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.