Home / 13,885.61-19,142.21-9,899.81

Finding the Fourth Proportional to 13,885.61, 19,142.21 and 9,899.81

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Solution

The fourth proportional to 13,885.61, 19,142.21 and 9,899.81 is: 13,647.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,885.61 : 19,142.21 = 9,899.81 : x
  2. Step 2: Convert to fraction form
    13,885.61/19,142.21 = 9,899.81/x
  3. Step 3: Cross multiply
    13,885.61x = 19,142.21 × 9,899.81
  4. Step 4: Simplify right side
    13,885.61x = 189,504,096.77
  5. Step 5: Solve for x
    x = 189,504,096.77/13,885.61
  6. Step 6: Final answer
    x = 13,647.52

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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.