Home / 14,280.81-21,420.41-3,891.75

Finding the Fourth Proportional to 14,280.81, 21,420.41 and 3,891.75

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Solution

The fourth proportional to 14,280.81, 21,420.41 and 3,891.75 is: 5,837.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,280.81 : 21,420.41 = 3,891.75 : x
  2. Step 2: Convert to fraction form
    14,280.81/21,420.41 = 3,891.75/x
  3. Step 3: Cross multiply
    14,280.81x = 21,420.41 × 3,891.75
  4. Step 4: Simplify right side
    14,280.81x = 83,362,861.16
  5. Step 5: Solve for x
    x = 83,362,861.16/14,280.81
  6. Step 6: Final answer
    x = 5,837.40

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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.