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Finding the Fourth Proportional to 21,011.94, 28,992.21 and 12,062.34

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Solution

The fourth proportional to 21,011.94, 28,992.21 and 12,062.34 is: 16,643.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.94 : 28,992.21 = 12,062.34 : x
  2. Step 2: Convert to fraction form
    21,011.94/28,992.21 = 12,062.34/x
  3. Step 3: Cross multiply
    21,011.94x = 28,992.21 × 12,062.34
  4. Step 4: Simplify right side
    21,011.94x = 349,713,894.37
  5. Step 5: Solve for x
    x = 349,713,894.37/21,011.94
  6. Step 6: Final answer
    x = 16,643.58

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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.