Home / 5,428.18-8,142.61-1,870.50

Finding the Fourth Proportional to 5,428.18, 8,142.61 and 1,870.50

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Solution

The fourth proportional to 5,428.18, 8,142.61 and 1,870.50 is: 2,805.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.18 : 8,142.61 = 1,870.50 : x
  2. Step 2: Convert to fraction form
    5,428.18/8,142.61 = 1,870.50/x
  3. Step 3: Cross multiply
    5,428.18x = 8,142.61 × 1,870.50
  4. Step 4: Simplify right side
    5,428.18x = 15,230,752.01
  5. Step 5: Solve for x
    x = 15,230,752.01/5,428.18
  6. Step 6: Final answer
    x = 2,805.87

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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.