Home / 5,421.79-8,133.83-1,911.66

Finding the Fourth Proportional to 5,421.79, 8,133.83 and 1,911.66

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Solution

The fourth proportional to 5,421.79, 8,133.83 and 1,911.66 is: 2,867.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.79 : 8,133.83 = 1,911.66 : x
  2. Step 2: Convert to fraction form
    5,421.79/8,133.83 = 1,911.66/x
  3. Step 3: Cross multiply
    5,421.79x = 8,133.83 × 1,911.66
  4. Step 4: Simplify right side
    5,421.79x = 15,549,117.46
  5. Step 5: Solve for x
    x = 15,549,117.46/5,421.79
  6. Step 6: Final answer
    x = 2,867.89

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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.