Home / 3,935.48-5,430.74-2,166.74

Finding the Fourth Proportional to 3,935.48, 5,430.74 and 2,166.74

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Solution

The fourth proportional to 3,935.48, 5,430.74 and 2,166.74 is: 2,989.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.48 : 5,430.74 = 2,166.74 : x
  2. Step 2: Convert to fraction form
    3,935.48/5,430.74 = 2,166.74/x
  3. Step 3: Cross multiply
    3,935.48x = 5,430.74 × 2,166.74
  4. Step 4: Simplify right side
    3,935.48x = 11,767,001.59
  5. Step 5: Solve for x
    x = 11,767,001.59/3,935.48
  6. Step 6: Final answer
    x = 2,989.98

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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.