Home / 2,887.43-3,985.08-2,140.34

Finding the Fourth Proportional to 2,887.43, 3,985.08 and 2,140.34

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Solution

The fourth proportional to 2,887.43, 3,985.08 and 2,140.34 is: 2,953.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.43 : 3,985.08 = 2,140.34 : x
  2. Step 2: Convert to fraction form
    2,887.43/3,985.08 = 2,140.34/x
  3. Step 3: Cross multiply
    2,887.43x = 3,985.08 × 2,140.34
  4. Step 4: Simplify right side
    2,887.43x = 8,529,426.13
  5. Step 5: Solve for x
    x = 8,529,426.13/2,887.43
  6. Step 6: Final answer
    x = 2,953.99

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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.