Home / 7,106.72-9,807.13-3,920.31

Finding the Fourth Proportional to 7,106.72, 9,807.13 and 3,920.31

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Solution

The fourth proportional to 7,106.72, 9,807.13 and 3,920.31 is: 5,409.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,106.72 : 9,807.13 = 3,920.31 : x
  2. Step 2: Convert to fraction form
    7,106.72/9,807.13 = 3,920.31/x
  3. Step 3: Cross multiply
    7,106.72x = 9,807.13 × 3,920.31
  4. Step 4: Simplify right side
    7,106.72x = 38,446,989.81
  5. Step 5: Solve for x
    x = 38,446,989.81/7,106.72
  6. Step 6: Final answer
    x = 5,409.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.