Home / 12,090.60-18,128.04-5,075.13

Finding the Fourth Proportional to 12,090.60, 18,128.04 and 5,075.13

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Solution

The fourth proportional to 12,090.60, 18,128.04 and 5,075.13 is: 7,609.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.60 : 18,128.04 = 5,075.13 : x
  2. Step 2: Convert to fraction form
    12,090.60/18,128.04 = 5,075.13/x
  3. Step 3: Cross multiply
    12,090.60x = 18,128.04 × 5,075.13
  4. Step 4: Simplify right side
    12,090.60x = 92,002,159.65
  5. Step 5: Solve for x
    x = 92,002,159.65/12,090.60
  6. Step 6: Final answer
    x = 7,609.40

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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.