Home / 5,205.20-7,810.85-1,920.58

Finding the Fourth Proportional to 5,205.20, 7,810.85 and 1,920.58

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Solution

The fourth proportional to 5,205.20, 7,810.85 and 1,920.58 is: 2,882.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,205.20 : 7,810.85 = 1,920.58 : x
  2. Step 2: Convert to fraction form
    5,205.20/7,810.85 = 1,920.58/x
  3. Step 3: Cross multiply
    5,205.20x = 7,810.85 × 1,920.58
  4. Step 4: Simplify right side
    5,205.20x = 15,001,362.29
  5. Step 5: Solve for x
    x = 15,001,362.29/5,205.20
  6. Step 6: Final answer
    x = 2,882.00

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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.