Home / 21,823-30,115.80-12,393.04

Finding the Fourth Proportional to 21,823, 30,115.80 and 12,393.04

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Solution

The fourth proportional to 21,823, 30,115.80 and 12,393.04 is: 17,102.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,823 : 30,115.80 = 12,393.04 : x
  2. Step 2: Convert to fraction form
    21,823/30,115.80 = 12,393.04/x
  3. Step 3: Cross multiply
    21,823x = 30,115.80 × 12,393.04
  4. Step 4: Simplify right side
    21,823x = 373,226,314.03
  5. Step 5: Solve for x
    x = 373,226,314.03/21,823
  6. Step 6: Final answer
    x = 17,102.43

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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.