Home / 13,875.12-19,148.04-8,289.36

Finding the Fourth Proportional to 13,875.12, 19,148.04 and 8,289.36

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Solution

The fourth proportional to 13,875.12, 19,148.04 and 8,289.36 is: 11,439.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,875.12 : 19,148.04 = 8,289.36 : x
  2. Step 2: Convert to fraction form
    13,875.12/19,148.04 = 8,289.36/x
  3. Step 3: Cross multiply
    13,875.12x = 19,148.04 × 8,289.36
  4. Step 4: Simplify right side
    13,875.12x = 158,724,996.85
  5. Step 5: Solve for x
    x = 158,724,996.85/13,875.12
  6. Step 6: Final answer
    x = 11,439.54

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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.