Home / 21,722.76-29,967.57-12,770.64

Finding the Fourth Proportional to 21,722.76, 29,967.57 and 12,770.64

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Solution

The fourth proportional to 21,722.76, 29,967.57 and 12,770.64 is: 17,617.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,722.76 : 29,967.57 = 12,770.64 : x
  2. Step 2: Convert to fraction form
    21,722.76/29,967.57 = 12,770.64/x
  3. Step 3: Cross multiply
    21,722.76x = 29,967.57 × 12,770.64
  4. Step 4: Simplify right side
    21,722.76x = 382,705,048.14
  5. Step 5: Solve for x
    x = 382,705,048.14/21,722.76
  6. Step 6: Final answer
    x = 17,617.70

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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.