Home / 13,782.20-19,019.62-7,813.72

Finding the Fourth Proportional to 13,782.20, 19,019.62 and 7,813.72

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Solution

The fourth proportional to 13,782.20, 19,019.62 and 7,813.72 is: 10,783.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,782.20 : 19,019.62 = 7,813.72 : x
  2. Step 2: Convert to fraction form
    13,782.20/19,019.62 = 7,813.72/x
  3. Step 3: Cross multiply
    13,782.20x = 19,019.62 × 7,813.72
  4. Step 4: Simplify right side
    13,782.20x = 148,613,985.19
  5. Step 5: Solve for x
    x = 148,613,985.19/13,782.20
  6. Step 6: Final answer
    x = 10,783.04

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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.