Home / 5,431.40-7,484.58-3,855.08

Finding the Fourth Proportional to 5,431.40, 7,484.58 and 3,855.08

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Solution

The fourth proportional to 5,431.40, 7,484.58 and 3,855.08 is: 5,312.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.40 : 7,484.58 = 3,855.08 : x
  2. Step 2: Convert to fraction form
    5,431.40/7,484.58 = 3,855.08/x
  3. Step 3: Cross multiply
    5,431.40x = 7,484.58 × 3,855.08
  4. Step 4: Simplify right side
    5,431.40x = 28,853,654.67
  5. Step 5: Solve for x
    x = 28,853,654.67/5,431.40
  6. Step 6: Final answer
    x = 5,312.38

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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.