Home / 21,918.46-30,248.69-12,485.22

Finding the Fourth Proportional to 21,918.46, 30,248.69 and 12,485.22

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Solution

The fourth proportional to 21,918.46, 30,248.69 and 12,485.22 is: 17,230.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.46 : 30,248.69 = 12,485.22 : x
  2. Step 2: Convert to fraction form
    21,918.46/30,248.69 = 12,485.22/x
  3. Step 3: Cross multiply
    21,918.46x = 30,248.69 × 12,485.22
  4. Step 4: Simplify right side
    21,918.46x = 377,661,549.36
  5. Step 5: Solve for x
    x = 377,661,549.36/21,918.46
  6. Step 6: Final answer
    x = 17,230.30

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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.