Home / 2,128.32-2,937.36-1,540.80

Finding the Fourth Proportional to 2,128.32, 2,937.36 and 1,540.80

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Solution

The fourth proportional to 2,128.32, 2,937.36 and 1,540.80 is: 2,126.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.32 : 2,937.36 = 1,540.80 : x
  2. Step 2: Convert to fraction form
    2,128.32/2,937.36 = 1,540.80/x
  3. Step 3: Cross multiply
    2,128.32x = 2,937.36 × 1,540.80
  4. Step 4: Simplify right side
    2,128.32x = 4,525,884.29
  5. Step 5: Solve for x
    x = 4,525,884.29/2,128.32
  6. Step 6: Final answer
    x = 2,126.51

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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.