Home / 21,108.68-29,127.46-12,159.10

Finding the Fourth Proportional to 21,108.68, 29,127.46 and 12,159.10

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Solution

The fourth proportional to 21,108.68, 29,127.46 and 12,159.10 is: 16,778.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.68 : 29,127.46 = 12,159.10 : x
  2. Step 2: Convert to fraction form
    21,108.68/29,127.46 = 12,159.10/x
  3. Step 3: Cross multiply
    21,108.68x = 29,127.46 × 12,159.10
  4. Step 4: Simplify right side
    21,108.68x = 354,163,698.89
  5. Step 5: Solve for x
    x = 354,163,698.89/21,108.68
  6. Step 6: Final answer
    x = 16,778.11

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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.