Home / 13,491.45-20,131.65-12,090.51

Finding the Fourth Proportional to 13,491.45, 20,131.65 and 12,090.51

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Solution

The fourth proportional to 13,491.45, 20,131.65 and 12,090.51 is: 18,041.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.45 : 20,131.65 = 12,090.51 : x
  2. Step 2: Convert to fraction form
    13,491.45/20,131.65 = 12,090.51/x
  3. Step 3: Cross multiply
    13,491.45x = 20,131.65 × 12,090.51
  4. Step 4: Simplify right side
    13,491.45x = 243,401,915.64
  5. Step 5: Solve for x
    x = 243,401,915.64/13,491.45
  6. Step 6: Final answer
    x = 18,041.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.