Home / 3,421.28-5,130.57-1,572.05

Finding the Fourth Proportional to 3,421.28, 5,130.57 and 1,572.05

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Solution

The fourth proportional to 3,421.28, 5,130.57 and 1,572.05 is: 2,357.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.28 : 5,130.57 = 1,572.05 : x
  2. Step 2: Convert to fraction form
    3,421.28/5,130.57 = 1,572.05/x
  3. Step 3: Cross multiply
    3,421.28x = 5,130.57 × 1,572.05
  4. Step 4: Simplify right side
    3,421.28x = 8,065,512.57
  5. Step 5: Solve for x
    x = 8,065,512.57/3,421.28
  6. Step 6: Final answer
    x = 2,357.45

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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.