Home / 21,764.72-30,043.67-12,812.60

Finding the Fourth Proportional to 21,764.72, 30,043.67 and 12,812.60

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Solution

The fourth proportional to 21,764.72, 30,043.67 and 12,812.60 is: 17,686.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,764.72 : 30,043.67 = 12,812.60 : x
  2. Step 2: Convert to fraction form
    21,764.72/30,043.67 = 12,812.60/x
  3. Step 3: Cross multiply
    21,764.72x = 30,043.67 × 12,812.60
  4. Step 4: Simplify right side
    21,764.72x = 384,937,311.96
  5. Step 5: Solve for x
    x = 384,937,311.96/21,764.72
  6. Step 6: Final answer
    x = 17,686.30

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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.