Home / 13,840.90-19,098.55-7,871.43

Finding the Fourth Proportional to 13,840.90, 19,098.55 and 7,871.43

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Solution

The fourth proportional to 13,840.90, 19,098.55 and 7,871.43 is: 10,861.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.90 : 19,098.55 = 7,871.43 : x
  2. Step 2: Convert to fraction form
    13,840.90/19,098.55 = 7,871.43/x
  3. Step 3: Cross multiply
    13,840.90x = 19,098.55 × 7,871.43
  4. Step 4: Simplify right side
    13,840.90x = 150,332,899.43
  5. Step 5: Solve for x
    x = 150,332,899.43/13,840.90
  6. Step 6: Final answer
    x = 10,861.50

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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.