Home / 21,886.32-30,202.94-12,455.40

Finding the Fourth Proportional to 21,886.32, 30,202.94 and 12,455.40

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Solution

The fourth proportional to 21,886.32, 30,202.94 and 12,455.40 is: 17,188.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,886.32 : 30,202.94 = 12,455.40 : x
  2. Step 2: Convert to fraction form
    21,886.32/30,202.94 = 12,455.40/x
  3. Step 3: Cross multiply
    21,886.32x = 30,202.94 × 12,455.40
  4. Step 4: Simplify right side
    21,886.32x = 376,189,636.60
  5. Step 5: Solve for x
    x = 376,189,636.60/21,886.32
  6. Step 6: Final answer
    x = 17,188.35

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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.