Home / 21,917.12-30,242.58-12,485.48

Finding the Fourth Proportional to 21,917.12, 30,242.58 and 12,485.48

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Solution

The fourth proportional to 21,917.12, 30,242.58 and 12,485.48 is: 17,228.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.12 : 30,242.58 = 12,485.48 : x
  2. Step 2: Convert to fraction form
    21,917.12/30,242.58 = 12,485.48/x
  3. Step 3: Cross multiply
    21,917.12x = 30,242.58 × 12,485.48
  4. Step 4: Simplify right side
    21,917.12x = 377,593,127.74
  5. Step 5: Solve for x
    x = 377,593,127.74/21,917.12
  6. Step 6: Final answer
    x = 17,228.23

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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.