Home / 7,123.94-10,686.21-1,929.81

Finding the Fourth Proportional to 7,123.94, 10,686.21 and 1,929.81

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Solution

The fourth proportional to 7,123.94, 10,686.21 and 1,929.81 is: 2,894.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.94 : 10,686.21 = 1,929.81 : x
  2. Step 2: Convert to fraction form
    7,123.94/10,686.21 = 1,929.81/x
  3. Step 3: Cross multiply
    7,123.94x = 10,686.21 × 1,929.81
  4. Step 4: Simplify right side
    7,123.94x = 20,622,354.92
  5. Step 5: Solve for x
    x = 20,622,354.92/7,123.94
  6. Step 6: Final answer
    x = 2,894.80

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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.