Home / 2,985.60-4,120.08-1,937.64

Finding the Fourth Proportional to 2,985.60, 4,120.08 and 1,937.64

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Solution

The fourth proportional to 2,985.60, 4,120.08 and 1,937.64 is: 2,673.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.60 : 4,120.08 = 1,937.64 : x
  2. Step 2: Convert to fraction form
    2,985.60/4,120.08 = 1,937.64/x
  3. Step 3: Cross multiply
    2,985.60x = 4,120.08 × 1,937.64
  4. Step 4: Simplify right side
    2,985.60x = 7,983,231.81
  5. Step 5: Solve for x
    x = 7,983,231.81/2,985.60
  6. Step 6: Final answer
    x = 2,673.91

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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.