Home / 5,421.60-8,139.69-3,477.60

Finding the Fourth Proportional to 5,421.60, 8,139.69 and 3,477.60

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Solution

The fourth proportional to 5,421.60, 8,139.69 and 3,477.60 is: 5,221.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.60 : 8,139.69 = 3,477.60 : x
  2. Step 2: Convert to fraction form
    5,421.60/8,139.69 = 3,477.60/x
  3. Step 3: Cross multiply
    5,421.60x = 8,139.69 × 3,477.60
  4. Step 4: Simplify right side
    5,421.60x = 28,306,585.94
  5. Step 5: Solve for x
    x = 28,306,585.94/5,421.60
  6. Step 6: Final answer
    x = 5,221.08

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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.