Home / 13,090.21-18,075.38-12,140.47

Finding the Fourth Proportional to 13,090.21, 18,075.38 and 12,140.47

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Solution

The fourth proportional to 13,090.21, 18,075.38 and 12,140.47 is: 16,763.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.21 : 18,075.38 = 12,140.47 : x
  2. Step 2: Convert to fraction form
    13,090.21/18,075.38 = 12,140.47/x
  3. Step 3: Cross multiply
    13,090.21x = 18,075.38 × 12,140.47
  4. Step 4: Simplify right side
    13,090.21x = 219,443,548.60
  5. Step 5: Solve for x
    x = 219,443,548.60/13,090.21
  6. Step 6: Final answer
    x = 16,763.95

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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.