Home / 13,321.04-18,380.40-9,075.20

Finding the Fourth Proportional to 13,321.04, 18,380.40 and 9,075.20

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Solution

The fourth proportional to 13,321.04, 18,380.40 and 9,075.20 is: 12,521.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.04 : 18,380.40 = 9,075.20 : x
  2. Step 2: Convert to fraction form
    13,321.04/18,380.40 = 9,075.20/x
  3. Step 3: Cross multiply
    13,321.04x = 18,380.40 × 9,075.20
  4. Step 4: Simplify right side
    13,321.04x = 166,805,806.08
  5. Step 5: Solve for x
    x = 166,805,806.08/13,321.04
  6. Step 6: Final answer
    x = 12,521.98

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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.