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Finding the Fourth Proportional to 13,070.92, 18,038.31 and 7,692.38

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Solution

The fourth proportional to 13,070.92, 18,038.31 and 7,692.38 is: 10,615.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,070.92 : 18,038.31 = 7,692.38 : x
  2. Step 2: Convert to fraction form
    13,070.92/18,038.31 = 7,692.38/x
  3. Step 3: Cross multiply
    13,070.92x = 18,038.31 × 7,692.38
  4. Step 4: Simplify right side
    13,070.92x = 138,757,551.33
  5. Step 5: Solve for x
    x = 138,757,551.33/13,070.92
  6. Step 6: Final answer
    x = 10,615.74

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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.