Home / 5,355.40-7,390.50-3,117.40

Finding the Fourth Proportional to 5,355.40, 7,390.50 and 3,117.40

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Solution

The fourth proportional to 5,355.40, 7,390.50 and 3,117.40 is: 4,302.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,355.40 : 7,390.50 = 3,117.40 : x
  2. Step 2: Convert to fraction form
    5,355.40/7,390.50 = 3,117.40/x
  3. Step 3: Cross multiply
    5,355.40x = 7,390.50 × 3,117.40
  4. Step 4: Simplify right side
    5,355.40x = 23,039,144.70
  5. Step 5: Solve for x
    x = 23,039,144.70/5,355.40
  6. Step 6: Final answer
    x = 4,302.04

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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.