Home / 12,948.80-19,408.80-7,109.60

Finding the Fourth Proportional to 12,948.80, 19,408.80 and 7,109.60

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Solution

The fourth proportional to 12,948.80, 19,408.80 and 7,109.60 is: 10,656.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,948.80 : 19,408.80 = 7,109.60 : x
  2. Step 2: Convert to fraction form
    12,948.80/19,408.80 = 7,109.60/x
  3. Step 3: Cross multiply
    12,948.80x = 19,408.80 × 7,109.60
  4. Step 4: Simplify right side
    12,948.80x = 137,988,804.48
  5. Step 5: Solve for x
    x = 137,988,804.48/12,948.80
  6. Step 6: Final answer
    x = 10,656.49

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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.