Home / 21,314.75-29,399.15-18,477.05

Finding the Fourth Proportional to 21,314.75, 29,399.15 and 18,477.05

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Solution

The fourth proportional to 21,314.75, 29,399.15 and 18,477.05 is: 25,485.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.75 : 29,399.15 = 18,477.05 : x
  2. Step 2: Convert to fraction form
    21,314.75/29,399.15 = 18,477.05/x
  3. Step 3: Cross multiply
    21,314.75x = 29,399.15 × 18,477.05
  4. Step 4: Simplify right side
    21,314.75x = 543,209,463.70
  5. Step 5: Solve for x
    x = 543,209,463.70/21,314.75
  6. Step 6: Final answer
    x = 25,485.15

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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.