Home / 21,770.46-30,032.94-15,789

Finding the Fourth Proportional to 21,770.46, 30,032.94 and 15,789

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Solution

The fourth proportional to 21,770.46, 30,032.94 and 15,789 is: 21,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,770.46 : 30,032.94 = 15,789 : x
  2. Step 2: Convert to fraction form
    21,770.46/30,032.94 = 15,789/x
  3. Step 3: Cross multiply
    21,770.46x = 30,032.94 × 15,789
  4. Step 4: Simplify right side
    21,770.46x = 474,190,089.66
  5. Step 5: Solve for x
    x = 474,190,089.66/21,770.46
  6. Step 6: Final answer
    x = 21,781.35

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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.