Home / 2,101.90-2,900.58-1,316.38

Finding the Fourth Proportional to 2,101.90, 2,900.58 and 1,316.38

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Solution

The fourth proportional to 2,101.90, 2,900.58 and 1,316.38 is: 1,816.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.90 : 2,900.58 = 1,316.38 : x
  2. Step 2: Convert to fraction form
    2,101.90/2,900.58 = 1,316.38/x
  3. Step 3: Cross multiply
    2,101.90x = 2,900.58 × 1,316.38
  4. Step 4: Simplify right side
    2,101.90x = 3,818,253.31
  5. Step 5: Solve for x
    x = 3,818,253.31/2,101.90
  6. Step 6: Final answer
    x = 1,816.57

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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.