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Finding the Fourth Proportional to 30,692.73, 42,341.65 and 19,936.87

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Solution

The fourth proportional to 30,692.73, 42,341.65 and 19,936.87 is: 27,503.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,692.73 : 42,341.65 = 19,936.87 : x
  2. Step 2: Convert to fraction form
    30,692.73/42,341.65 = 19,936.87/x
  3. Step 3: Cross multiply
    30,692.73x = 42,341.65 × 19,936.87
  4. Step 4: Simplify right side
    30,692.73x = 844,159,971.64
  5. Step 5: Solve for x
    x = 844,159,971.64/30,692.73
  6. Step 6: Final answer
    x = 27,503.58

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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.