Home / 13,161.40-19,742.10-11,113.40

Finding the Fourth Proportional to 13,161.40, 19,742.10 and 11,113.40

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Solution

The fourth proportional to 13,161.40, 19,742.10 and 11,113.40 is: 16,670.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,161.40 : 19,742.10 = 11,113.40 : x
  2. Step 2: Convert to fraction form
    13,161.40/19,742.10 = 11,113.40/x
  3. Step 3: Cross multiply
    13,161.40x = 19,742.10 × 11,113.40
  4. Step 4: Simplify right side
    13,161.40x = 219,401,854.14
  5. Step 5: Solve for x
    x = 219,401,854.14/13,161.40
  6. Step 6: Final answer
    x = 16,670.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.