Home / 21,095.78-29,107.35-12,141.63

Finding the Fourth Proportional to 21,095.78, 29,107.35 and 12,141.63

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Solution

The fourth proportional to 21,095.78, 29,107.35 and 12,141.63 is: 16,752.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,095.78 : 29,107.35 = 12,141.63 : x
  2. Step 2: Convert to fraction form
    21,095.78/29,107.35 = 12,141.63/x
  3. Step 3: Cross multiply
    21,095.78x = 29,107.35 × 12,141.63
  4. Step 4: Simplify right side
    21,095.78x = 353,410,673.98
  5. Step 5: Solve for x
    x = 353,410,673.98/21,095.78
  6. Step 6: Final answer
    x = 16,752.68

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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.