Home / 13,871.13-19,142.15-8,911.77

Finding the Fourth Proportional to 13,871.13, 19,142.15 and 8,911.77

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Solution

The fourth proportional to 13,871.13, 19,142.15 and 8,911.77 is: 12,298.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.13 : 19,142.15 = 8,911.77 : x
  2. Step 2: Convert to fraction form
    13,871.13/19,142.15 = 8,911.77/x
  3. Step 3: Cross multiply
    13,871.13x = 19,142.15 × 8,911.77
  4. Step 4: Simplify right side
    13,871.13x = 170,590,438.11
  5. Step 5: Solve for x
    x = 170,590,438.11/13,871.13
  6. Step 6: Final answer
    x = 12,298.24

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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.