Home / 21,190.05-31,779.75-8,713.56

Finding the Fourth Proportional to 21,190.05, 31,779.75 and 8,713.56

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Solution

The fourth proportional to 21,190.05, 31,779.75 and 8,713.56 is: 13,068.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.05 : 31,779.75 = 8,713.56 : x
  2. Step 2: Convert to fraction form
    21,190.05/31,779.75 = 8,713.56/x
  3. Step 3: Cross multiply
    21,190.05x = 31,779.75 × 8,713.56
  4. Step 4: Simplify right side
    21,190.05x = 276,914,758.41
  5. Step 5: Solve for x
    x = 276,914,758.41/21,190.05
  6. Step 6: Final answer
    x = 13,068.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.