Home / 2,129.10-2,939.67-1,542.30

Finding the Fourth Proportional to 2,129.10, 2,939.67 and 1,542.30

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Solution

The fourth proportional to 2,129.10, 2,939.67 and 1,542.30 is: 2,129.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.10 : 2,939.67 = 1,542.30 : x
  2. Step 2: Convert to fraction form
    2,129.10/2,939.67 = 1,542.30/x
  3. Step 3: Cross multiply
    2,129.10x = 2,939.67 × 1,542.30
  4. Step 4: Simplify right side
    2,129.10x = 4,533,853.04
  5. Step 5: Solve for x
    x = 4,533,853.04/2,129.10
  6. Step 6: Final answer
    x = 2,129.47

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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.