Home / 2,688.18-3,711.33-2,130.90

Finding the Fourth Proportional to 2,688.18, 3,711.33 and 2,130.90

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Solution

The fourth proportional to 2,688.18, 3,711.33 and 2,130.90 is: 2,941.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.18 : 3,711.33 = 2,130.90 : x
  2. Step 2: Convert to fraction form
    2,688.18/3,711.33 = 2,130.90/x
  3. Step 3: Cross multiply
    2,688.18x = 3,711.33 × 2,130.90
  4. Step 4: Simplify right side
    2,688.18x = 7,908,473.10
  5. Step 5: Solve for x
    x = 7,908,473.10/2,688.18
  6. Step 6: Final answer
    x = 2,941.94

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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.