Home / 25,360.40-38,040.60-7,830.20

Finding the Fourth Proportional to 25,360.40, 38,040.60 and 7,830.20

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Solution

The fourth proportional to 25,360.40, 38,040.60 and 7,830.20 is: 11,745.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,360.40 : 38,040.60 = 7,830.20 : x
  2. Step 2: Convert to fraction form
    25,360.40/38,040.60 = 7,830.20/x
  3. Step 3: Cross multiply
    25,360.40x = 38,040.60 × 7,830.20
  4. Step 4: Simplify right side
    25,360.40x = 297,865,506.12
  5. Step 5: Solve for x
    x = 297,865,506.12/25,360.40
  6. Step 6: Final answer
    x = 11,745.30

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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.