Home / 3,129.21-4,318.02-1,870.02

Finding the Fourth Proportional to 3,129.21, 4,318.02 and 1,870.02

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Solution

The fourth proportional to 3,129.21, 4,318.02 and 1,870.02 is: 2,580.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.21 : 4,318.02 = 1,870.02 : x
  2. Step 2: Convert to fraction form
    3,129.21/4,318.02 = 1,870.02/x
  3. Step 3: Cross multiply
    3,129.21x = 4,318.02 × 1,870.02
  4. Step 4: Simplify right side
    3,129.21x = 8,074,763.62
  5. Step 5: Solve for x
    x = 8,074,763.62/3,129.21
  6. Step 6: Final answer
    x = 2,580.45

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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.