Home / 13,730.40-20,628.48-8,809.68

Finding the Fourth Proportional to 13,730.40, 20,628.48 and 8,809.68

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Solution

The fourth proportional to 13,730.40, 20,628.48 and 8,809.68 is: 13,235.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,730.40 : 20,628.48 = 8,809.68 : x
  2. Step 2: Convert to fraction form
    13,730.40/20,628.48 = 8,809.68/x
  3. Step 3: Cross multiply
    13,730.40x = 20,628.48 × 8,809.68
  4. Step 4: Simplify right side
    13,730.40x = 181,730,307.69
  5. Step 5: Solve for x
    x = 181,730,307.69/13,730.40
  6. Step 6: Final answer
    x = 13,235.62

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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.