Home / 5,130.26-7,078.45-3,140.09

Finding the Fourth Proportional to 5,130.26, 7,078.45 and 3,140.09

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Solution

The fourth proportional to 5,130.26, 7,078.45 and 3,140.09 is: 4,332.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.26 : 7,078.45 = 3,140.09 : x
  2. Step 2: Convert to fraction form
    5,130.26/7,078.45 = 3,140.09/x
  3. Step 3: Cross multiply
    5,130.26x = 7,078.45 × 3,140.09
  4. Step 4: Simplify right side
    5,130.26x = 22,226,970.06
  5. Step 5: Solve for x
    x = 22,226,970.06/5,130.26
  6. Step 6: Final answer
    x = 4,332.52

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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.