Home / 3,156.29-4,355.70-1,830.78

Finding the Fourth Proportional to 3,156.29, 4,355.70 and 1,830.78

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Solution

The fourth proportional to 3,156.29, 4,355.70 and 1,830.78 is: 2,526.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.29 : 4,355.70 = 1,830.78 : x
  2. Step 2: Convert to fraction form
    3,156.29/4,355.70 = 1,830.78/x
  3. Step 3: Cross multiply
    3,156.29x = 4,355.70 × 1,830.78
  4. Step 4: Simplify right side
    3,156.29x = 7,974,328.45
  5. Step 5: Solve for x
    x = 7,974,328.45/3,156.29
  6. Step 6: Final answer
    x = 2,526.49

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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.