Home / 21,735.15-30,001.64-12,782.22

Finding the Fourth Proportional to 21,735.15, 30,001.64 and 12,782.22

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Solution

The fourth proportional to 21,735.15, 30,001.64 and 12,782.22 is: 17,643.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,735.15 : 30,001.64 = 12,782.22 : x
  2. Step 2: Convert to fraction form
    21,735.15/30,001.64 = 12,782.22/x
  3. Step 3: Cross multiply
    21,735.15x = 30,001.64 × 12,782.22
  4. Step 4: Simplify right side
    21,735.15x = 383,487,498.93
  5. Step 5: Solve for x
    x = 383,487,498.93/21,735.15
  6. Step 6: Final answer
    x = 17,643.66

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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.