Home / 3,420.10-5,130.15-1,864.90

Finding the Fourth Proportional to 3,420.10, 5,130.15 and 1,864.90

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Solution

The fourth proportional to 3,420.10, 5,130.15 and 1,864.90 is: 2,797.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.10 : 5,130.15 = 1,864.90 : x
  2. Step 2: Convert to fraction form
    3,420.10/5,130.15 = 1,864.90/x
  3. Step 3: Cross multiply
    3,420.10x = 5,130.15 × 1,864.90
  4. Step 4: Simplify right side
    3,420.10x = 9,567,216.74
  5. Step 5: Solve for x
    x = 9,567,216.74/3,420.10
  6. Step 6: Final answer
    x = 2,797.35

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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.