Home / 12,400.48-17,110.74-7,928.20

Finding the Fourth Proportional to 12,400.48, 17,110.74 and 7,928.20

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Solution

The fourth proportional to 12,400.48, 17,110.74 and 7,928.20 is: 10,939.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,400.48 : 17,110.74 = 7,928.20 : x
  2. Step 2: Convert to fraction form
    12,400.48/17,110.74 = 7,928.20/x
  3. Step 3: Cross multiply
    12,400.48x = 17,110.74 × 7,928.20
  4. Step 4: Simplify right side
    12,400.48x = 135,657,368.87
  5. Step 5: Solve for x
    x = 135,657,368.87/12,400.48
  6. Step 6: Final answer
    x = 10,939.69

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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.