Home / 2,101.60-3,152.40-2,087.20

Finding the Fourth Proportional to 2,101.60, 3,152.40 and 2,087.20

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Solution

The fourth proportional to 2,101.60, 3,152.40 and 2,087.20 is: 3,130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.60 : 3,152.40 = 2,087.20 : x
  2. Step 2: Convert to fraction form
    2,101.60/3,152.40 = 2,087.20/x
  3. Step 3: Cross multiply
    2,101.60x = 3,152.40 × 2,087.20
  4. Step 4: Simplify right side
    2,101.60x = 6,579,689.28
  5. Step 5: Solve for x
    x = 6,579,689.28/2,101.60
  6. Step 6: Final answer
    x = 3,130.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.