Home / 21,190.44-31,780.80-9,507

Finding the Fourth Proportional to 21,190.44, 31,780.80 and 9,507

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Solution

The fourth proportional to 21,190.44, 31,780.80 and 9,507 is: 14,258.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.44 : 31,780.80 = 9,507 : x
  2. Step 2: Convert to fraction form
    21,190.44/31,780.80 = 9,507/x
  3. Step 3: Cross multiply
    21,190.44x = 31,780.80 × 9,507
  4. Step 4: Simplify right side
    21,190.44x = 302,140,065.60
  5. Step 5: Solve for x
    x = 302,140,065.60/21,190.44
  6. Step 6: Final answer
    x = 14,258.32

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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.