Home / 13,485.63-18,609.30-7,820.58

Finding the Fourth Proportional to 13,485.63, 18,609.30 and 7,820.58

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Solution

The fourth proportional to 13,485.63, 18,609.30 and 7,820.58 is: 10,791.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,485.63 : 18,609.30 = 7,820.58 : x
  2. Step 2: Convert to fraction form
    13,485.63/18,609.30 = 7,820.58/x
  3. Step 3: Cross multiply
    13,485.63x = 18,609.30 × 7,820.58
  4. Step 4: Simplify right side
    13,485.63x = 145,535,519.39
  5. Step 5: Solve for x
    x = 145,535,519.39/13,485.63
  6. Step 6: Final answer
    x = 10,791.90

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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.