Home / 13,783.50-19,020.67-7,815.05

Finding the Fourth Proportional to 13,783.50, 19,020.67 and 7,815.05

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Solution

The fourth proportional to 13,783.50, 19,020.67 and 7,815.05 is: 10,784.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,783.50 : 19,020.67 = 7,815.05 : x
  2. Step 2: Convert to fraction form
    13,783.50/19,020.67 = 7,815.05/x
  3. Step 3: Cross multiply
    13,783.50x = 19,020.67 × 7,815.05
  4. Step 4: Simplify right side
    13,783.50x = 148,647,487.08
  5. Step 5: Solve for x
    x = 148,647,487.08/13,783.50
  6. Step 6: Final answer
    x = 10,784.45

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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.