Home / 20,692.48-31,038.72-5,110.11

Finding the Fourth Proportional to 20,692.48, 31,038.72 and 5,110.11

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Solution

The fourth proportional to 20,692.48, 31,038.72 and 5,110.11 is: 7,665.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.48 : 31,038.72 = 5,110.11 : x
  2. Step 2: Convert to fraction form
    20,692.48/31,038.72 = 5,110.11/x
  3. Step 3: Cross multiply
    20,692.48x = 31,038.72 × 5,110.11
  4. Step 4: Simplify right side
    20,692.48x = 158,611,273.46
  5. Step 5: Solve for x
    x = 158,611,273.46/20,692.48
  6. Step 6: Final answer
    x = 7,665.17

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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.