Home / 14,289.80-21,405.90-9,912.20

Finding the Fourth Proportional to 14,289.80, 21,405.90 and 9,912.20

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Solution

The fourth proportional to 14,289.80, 21,405.90 and 9,912.20 is: 14,848.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,289.80 : 21,405.90 = 9,912.20 : x
  2. Step 2: Convert to fraction form
    14,289.80/21,405.90 = 9,912.20/x
  3. Step 3: Cross multiply
    14,289.80x = 21,405.90 × 9,912.20
  4. Step 4: Simplify right side
    14,289.80x = 212,179,561.98
  5. Step 5: Solve for x
    x = 212,179,561.98/14,289.80
  6. Step 6: Final answer
    x = 14,848.32

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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.