Home / 5,130.74-7,078.89-3,139.36

Finding the Fourth Proportional to 5,130.74, 7,078.89 and 3,139.36

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Solution

The fourth proportional to 5,130.74, 7,078.89 and 3,139.36 is: 4,331.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.74 : 7,078.89 = 3,139.36 : x
  2. Step 2: Convert to fraction form
    5,130.74/7,078.89 = 3,139.36/x
  3. Step 3: Cross multiply
    5,130.74x = 7,078.89 × 3,139.36
  4. Step 4: Simplify right side
    5,130.74x = 22,223,178.19
  5. Step 5: Solve for x
    x = 22,223,178.19/5,130.74
  6. Step 6: Final answer
    x = 4,331.38

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Find fourth proportional to 2,565.37, 3,539.45 and 1,569.68
Half scale
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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.