Home / 13,155.40-19,734.60-4,391.20

Finding the Fourth Proportional to 13,155.40, 19,734.60 and 4,391.20

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Solution

The fourth proportional to 13,155.40, 19,734.60 and 4,391.20 is: 6,587.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.40 : 19,734.60 = 4,391.20 : x
  2. Step 2: Convert to fraction form
    13,155.40/19,734.60 = 4,391.20/x
  3. Step 3: Cross multiply
    13,155.40x = 19,734.60 × 4,391.20
  4. Step 4: Simplify right side
    13,155.40x = 86,658,575.52
  5. Step 5: Solve for x
    x = 86,658,575.52/13,155.40
  6. Step 6: Final answer
    x = 6,587.30

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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.