Home / 3,139.16-4,707.92-947.63

Finding the Fourth Proportional to 3,139.16, 4,707.92 and 947.63

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Solution

The fourth proportional to 3,139.16, 4,707.92 and 947.63 is: 1,421.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.16 : 4,707.92 = 947.63 : x
  2. Step 2: Convert to fraction form
    3,139.16/4,707.92 = 947.63/x
  3. Step 3: Cross multiply
    3,139.16x = 4,707.92 × 947.63
  4. Step 4: Simplify right side
    3,139.16x = 4,461,380.37
  5. Step 5: Solve for x
    x = 4,461,380.37/3,139.16
  6. Step 6: Final answer
    x = 1,421.20

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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.