Home / 2,911.70-4,018.08-1,585.40

Finding the Fourth Proportional to 2,911.70, 4,018.08 and 1,585.40

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Solution

The fourth proportional to 2,911.70, 4,018.08 and 1,585.40 is: 2,187.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.70 : 4,018.08 = 1,585.40 : x
  2. Step 2: Convert to fraction form
    2,911.70/4,018.08 = 1,585.40/x
  3. Step 3: Cross multiply
    2,911.70x = 4,018.08 × 1,585.40
  4. Step 4: Simplify right side
    2,911.70x = 6,370,264.03
  5. Step 5: Solve for x
    x = 6,370,264.03/2,911.70
  6. Step 6: Final answer
    x = 2,187.82

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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.