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Finding the Fourth Proportional to 15,075, 20,803.76 and 8,360.92

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Solution

The fourth proportional to 15,075, 20,803.76 and 8,360.92 is: 11,538.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,075 : 20,803.76 = 8,360.92 : x
  2. Step 2: Convert to fraction form
    15,075/20,803.76 = 8,360.92/x
  3. Step 3: Cross multiply
    15,075x = 20,803.76 × 8,360.92
  4. Step 4: Simplify right side
    15,075x = 173,938,573.06
  5. Step 5: Solve for x
    x = 173,938,573.06/15,075
  6. Step 6: Final answer
    x = 11,538.21

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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.