Home / 13,128.40-19,659.48-7,860.16

Finding the Fourth Proportional to 13,128.40, 19,659.48 and 7,860.16

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Solution

The fourth proportional to 13,128.40, 19,659.48 and 7,860.16 is: 11,770.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.40 : 19,659.48 = 7,860.16 : x
  2. Step 2: Convert to fraction form
    13,128.40/19,659.48 = 7,860.16/x
  3. Step 3: Cross multiply
    13,128.40x = 19,659.48 × 7,860.16
  4. Step 4: Simplify right side
    13,128.40x = 154,526,658.32
  5. Step 5: Solve for x
    x = 154,526,658.32/13,128.40
  6. Step 6: Final answer
    x = 11,770.41

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1.5x scale

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.