Home / 15,439.50-21,311.40-9,850.50

Finding the Fourth Proportional to 15,439.50, 21,311.40 and 9,850.50

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Solution

The fourth proportional to 15,439.50, 21,311.40 and 9,850.50 is: 13,596.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.50 : 21,311.40 = 9,850.50 : x
  2. Step 2: Convert to fraction form
    15,439.50/21,311.40 = 9,850.50/x
  3. Step 3: Cross multiply
    15,439.50x = 21,311.40 × 9,850.50
  4. Step 4: Simplify right side
    15,439.50x = 209,927,945.70
  5. Step 5: Solve for x
    x = 209,927,945.70/15,439.50
  6. Step 6: Final answer
    x = 13,596.81

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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.