Home / 21,980.67-30,331.36-13,026.72

Finding the Fourth Proportional to 21,980.67, 30,331.36 and 13,026.72

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Solution

The fourth proportional to 21,980.67, 30,331.36 and 13,026.72 is: 17,975.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,980.67 : 30,331.36 = 13,026.72 : x
  2. Step 2: Convert to fraction form
    21,980.67/30,331.36 = 13,026.72/x
  3. Step 3: Cross multiply
    21,980.67x = 30,331.36 × 13,026.72
  4. Step 4: Simplify right side
    21,980.67x = 395,118,263.97
  5. Step 5: Solve for x
    x = 395,118,263.97/21,980.67
  6. Step 6: Final answer
    x = 17,975.72

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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.