Home / 2,130.56-2,939.38-1,432.40

Finding the Fourth Proportional to 2,130.56, 2,939.38 and 1,432.40

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Solution

The fourth proportional to 2,130.56, 2,939.38 and 1,432.40 is: 1,976.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.56 : 2,939.38 = 1,432.40 : x
  2. Step 2: Convert to fraction form
    2,130.56/2,939.38 = 1,432.40/x
  3. Step 3: Cross multiply
    2,130.56x = 2,939.38 × 1,432.40
  4. Step 4: Simplify right side
    2,130.56x = 4,210,367.91
  5. Step 5: Solve for x
    x = 4,210,367.91/2,130.56
  6. Step 6: Final answer
    x = 1,976.18

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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.