Home / 21,640.90-29,864.31-12,080.23

Finding the Fourth Proportional to 21,640.90, 29,864.31 and 12,080.23

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Solution

The fourth proportional to 21,640.90, 29,864.31 and 12,080.23 is: 16,670.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,640.90 : 29,864.31 = 12,080.23 : x
  2. Step 2: Convert to fraction form
    21,640.90/29,864.31 = 12,080.23/x
  3. Step 3: Cross multiply
    21,640.90x = 29,864.31 × 12,080.23
  4. Step 4: Simplify right side
    21,640.90x = 360,767,658.93
  5. Step 5: Solve for x
    x = 360,767,658.93/21,640.90
  6. Step 6: Final answer
    x = 16,670.64

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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.