Home / 3,139.50-4,708.26-947.55

Finding the Fourth Proportional to 3,139.50, 4,708.26 and 947.55

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Solution

The fourth proportional to 3,139.50, 4,708.26 and 947.55 is: 1,421.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.50 : 4,708.26 = 947.55 : x
  2. Step 2: Convert to fraction form
    3,139.50/4,708.26 = 947.55/x
  3. Step 3: Cross multiply
    3,139.50x = 4,708.26 × 947.55
  4. Step 4: Simplify right side
    3,139.50x = 4,461,311.76
  5. Step 5: Solve for x
    x = 4,461,311.76/3,139.50
  6. Step 6: Final answer
    x = 1,421.03

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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.