Home / 15,493.75-21,378.73-8,777.99

Finding the Fourth Proportional to 15,493.75, 21,378.73 and 8,777.99

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Solution

The fourth proportional to 15,493.75, 21,378.73 and 8,777.99 is: 12,112.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,493.75 : 21,378.73 = 8,777.99 : x
  2. Step 2: Convert to fraction form
    15,493.75/21,378.73 = 8,777.99/x
  3. Step 3: Cross multiply
    15,493.75x = 21,378.73 × 8,777.99
  4. Step 4: Simplify right side
    15,493.75x = 187,662,127.37
  5. Step 5: Solve for x
    x = 187,662,127.37/15,493.75
  6. Step 6: Final answer
    x = 12,112.12

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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.