Home / 21,830.06-30,126.09-12,876.74

Finding the Fourth Proportional to 21,830.06, 30,126.09 and 12,876.74

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Solution

The fourth proportional to 21,830.06, 30,126.09 and 12,876.74 is: 17,770.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,830.06 : 30,126.09 = 12,876.74 : x
  2. Step 2: Convert to fraction form
    21,830.06/30,126.09 = 12,876.74/x
  3. Step 3: Cross multiply
    21,830.06x = 30,126.09 × 12,876.74
  4. Step 4: Simplify right side
    21,830.06x = 387,925,828.15
  5. Step 5: Solve for x
    x = 387,925,828.15/21,830.06
  6. Step 6: Final answer
    x = 17,770.26

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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.