Home / 21,764.64-30,045.42-12,809.28

Finding the Fourth Proportional to 21,764.64, 30,045.42 and 12,809.28

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Solution

The fourth proportional to 21,764.64, 30,045.42 and 12,809.28 is: 17,682.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,764.64 : 30,045.42 = 12,809.28 : x
  2. Step 2: Convert to fraction form
    21,764.64/30,045.42 = 12,809.28/x
  3. Step 3: Cross multiply
    21,764.64x = 30,045.42 × 12,809.28
  4. Step 4: Simplify right side
    21,764.64x = 384,860,197.50
  5. Step 5: Solve for x
    x = 384,860,197.50/21,764.64
  6. Step 6: Final answer
    x = 17,682.82

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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.