Home / 21,057.12-31,587.36-12,292.92

Finding the Fourth Proportional to 21,057.12, 31,587.36 and 12,292.92

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Solution

The fourth proportional to 21,057.12, 31,587.36 and 12,292.92 is: 18,440.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.12 : 31,587.36 = 12,292.92 : x
  2. Step 2: Convert to fraction form
    21,057.12/31,587.36 = 12,292.92/x
  3. Step 3: Cross multiply
    21,057.12x = 31,587.36 × 12,292.92
  4. Step 4: Simplify right side
    21,057.12x = 388,300,889.49
  5. Step 5: Solve for x
    x = 388,300,889.49/21,057.12
  6. Step 6: Final answer
    x = 18,440.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.