Home / 21,259.18-31,887.96-8,776

Finding the Fourth Proportional to 21,259.18, 31,887.96 and 8,776

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Solution

The fourth proportional to 21,259.18, 31,887.96 and 8,776 is: 13,163.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,259.18 : 31,887.96 = 8,776 : x
  2. Step 2: Convert to fraction form
    21,259.18/31,887.96 = 8,776/x
  3. Step 3: Cross multiply
    21,259.18x = 31,887.96 × 8,776
  4. Step 4: Simplify right side
    21,259.18x = 279,848,736.96
  5. Step 5: Solve for x
    x = 279,848,736.96/21,259.18
  6. Step 6: Final answer
    x = 13,163.67

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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.