Home / 13,782.90-19,019.85-8,117.89

Finding the Fourth Proportional to 13,782.90, 19,019.85 and 8,117.89

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Solution

The fourth proportional to 13,782.90, 19,019.85 and 8,117.89 is: 11,202.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,782.90 : 19,019.85 = 8,117.89 : x
  2. Step 2: Convert to fraction form
    13,782.90/19,019.85 = 8,117.89/x
  3. Step 3: Cross multiply
    13,782.90x = 19,019.85 × 8,117.89
  4. Step 4: Simplify right side
    13,782.90x = 154,400,972.12
  5. Step 5: Solve for x
    x = 154,400,972.12/13,782.90
  6. Step 6: Final answer
    x = 11,202.35

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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.