Home / 5,142.39-7,711.99-1,855.05

Finding the Fourth Proportional to 5,142.39, 7,711.99 and 1,855.05

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Solution

The fourth proportional to 5,142.39, 7,711.99 and 1,855.05 is: 2,782.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,142.39 : 7,711.99 = 1,855.05 : x
  2. Step 2: Convert to fraction form
    5,142.39/7,711.99 = 1,855.05/x
  3. Step 3: Cross multiply
    5,142.39x = 7,711.99 × 1,855.05
  4. Step 4: Simplify right side
    5,142.39x = 14,306,154.81
  5. Step 5: Solve for x
    x = 14,306,154.81/5,142.39
  6. Step 6: Final answer
    x = 2,782.01

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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.