Home / 21,970.47-30,321.42-12,540.45

Finding the Fourth Proportional to 21,970.47, 30,321.42 and 12,540.45

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Solution

The fourth proportional to 21,970.47, 30,321.42 and 12,540.45 is: 17,307.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.47 : 30,321.42 = 12,540.45 : x
  2. Step 2: Convert to fraction form
    21,970.47/30,321.42 = 12,540.45/x
  3. Step 3: Cross multiply
    21,970.47x = 30,321.42 × 12,540.45
  4. Step 4: Simplify right side
    21,970.47x = 380,244,251.44
  5. Step 5: Solve for x
    x = 380,244,251.44/21,970.47
  6. Step 6: Final answer
    x = 17,307.06

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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.