Home / 2,875.30-3,967.86-1,812.85

Finding the Fourth Proportional to 2,875.30, 3,967.86 and 1,812.85

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Solution

The fourth proportional to 2,875.30, 3,967.86 and 1,812.85 is: 2,501.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,875.30 : 3,967.86 = 1,812.85 : x
  2. Step 2: Convert to fraction form
    2,875.30/3,967.86 = 1,812.85/x
  3. Step 3: Cross multiply
    2,875.30x = 3,967.86 × 1,812.85
  4. Step 4: Simplify right side
    2,875.30x = 7,193,135.00
  5. Step 5: Solve for x
    x = 7,193,135.00/2,875.30
  6. Step 6: Final answer
    x = 2,501.70

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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.