Home / 12,928.23-17,840.48-7,900.87

Finding the Fourth Proportional to 12,928.23, 17,840.48 and 7,900.87

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Solution

The fourth proportional to 12,928.23, 17,840.48 and 7,900.87 is: 10,902.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.23 : 17,840.48 = 7,900.87 : x
  2. Step 2: Convert to fraction form
    12,928.23/17,840.48 = 7,900.87/x
  3. Step 3: Cross multiply
    12,928.23x = 17,840.48 × 7,900.87
  4. Step 4: Simplify right side
    12,928.23x = 140,955,313.22
  5. Step 5: Solve for x
    x = 140,955,313.22/12,928.23
  6. Step 6: Final answer
    x = 10,902.91

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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.