Home / 13,128.03-18,116.96-7,159.73

Finding the Fourth Proportional to 13,128.03, 18,116.96 and 7,159.73

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Solution

The fourth proportional to 13,128.03, 18,116.96 and 7,159.73 is: 9,880.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.03 : 18,116.96 = 7,159.73 : x
  2. Step 2: Convert to fraction form
    13,128.03/18,116.96 = 7,159.73/x
  3. Step 3: Cross multiply
    13,128.03x = 18,116.96 × 7,159.73
  4. Step 4: Simplify right side
    13,128.03x = 129,712,415.64
  5. Step 5: Solve for x
    x = 129,712,415.64/13,128.03
  6. Step 6: Final answer
    x = 9,880.57

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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.