Home / 28,080.55-42,120.10-11,440.52

Finding the Fourth Proportional to 28,080.55, 42,120.10 and 11,440.52

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Solution

The fourth proportional to 28,080.55, 42,120.10 and 11,440.52 is: 17,160.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080.55 : 42,120.10 = 11,440.52 : x
  2. Step 2: Convert to fraction form
    28,080.55/42,120.10 = 11,440.52/x
  3. Step 3: Cross multiply
    28,080.55x = 42,120.10 × 11,440.52
  4. Step 4: Simplify right side
    28,080.55x = 481,875,689.64
  5. Step 5: Solve for x
    x = 481,875,689.64/28,080.55
  6. Step 6: Final answer
    x = 17,160.48

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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.