Home / 5,423.20-7,485.12-3,938.08

Finding the Fourth Proportional to 5,423.20, 7,485.12 and 3,938.08

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Solution

The fourth proportional to 5,423.20, 7,485.12 and 3,938.08 is: 5,435.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,423.20 : 7,485.12 = 3,938.08 : x
  2. Step 2: Convert to fraction form
    5,423.20/7,485.12 = 3,938.08/x
  3. Step 3: Cross multiply
    5,423.20x = 7,485.12 × 3,938.08
  4. Step 4: Simplify right side
    5,423.20x = 29,477,001.37
  5. Step 5: Solve for x
    x = 29,477,001.37/5,423.20
  6. Step 6: Final answer
    x = 5,435.35

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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.