Home / 13,128.68-18,102.86-10,731.20

Finding the Fourth Proportional to 13,128.68, 18,102.86 and 10,731.20

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Solution

The fourth proportional to 13,128.68, 18,102.86 and 10,731.20 is: 14,797.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.68 : 18,102.86 = 10,731.20 : x
  2. Step 2: Convert to fraction form
    13,128.68/18,102.86 = 10,731.20/x
  3. Step 3: Cross multiply
    13,128.68x = 18,102.86 × 10,731.20
  4. Step 4: Simplify right side
    13,128.68x = 194,265,411.23
  5. Step 5: Solve for x
    x = 194,265,411.23/13,128.68
  6. Step 6: Final answer
    x = 14,797.03

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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.