Home / 5,420.12-8,130.40-2,643.48

Finding the Fourth Proportional to 5,420.12, 8,130.40 and 2,643.48

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Solution

The fourth proportional to 5,420.12, 8,130.40 and 2,643.48 is: 3,965.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.12 : 8,130.40 = 2,643.48 : x
  2. Step 2: Convert to fraction form
    5,420.12/8,130.40 = 2,643.48/x
  3. Step 3: Cross multiply
    5,420.12x = 8,130.40 × 2,643.48
  4. Step 4: Simplify right side
    5,420.12x = 21,492,543.18
  5. Step 5: Solve for x
    x = 21,492,543.18/5,420.12
  6. Step 6: Final answer
    x = 3,965.33

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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.