Home / 6,420.19-8,858.98-3,587.22

Finding the Fourth Proportional to 6,420.19, 8,858.98 and 3,587.22

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Solution

The fourth proportional to 6,420.19, 8,858.98 and 3,587.22 is: 4,949.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.19 : 8,858.98 = 3,587.22 : x
  2. Step 2: Convert to fraction form
    6,420.19/8,858.98 = 3,587.22/x
  3. Step 3: Cross multiply
    6,420.19x = 8,858.98 × 3,587.22
  4. Step 4: Simplify right side
    6,420.19x = 31,779,065.94
  5. Step 5: Solve for x
    x = 31,779,065.94/6,420.19
  6. Step 6: Final answer
    x = 4,949.86

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Half scale
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Double scale
Find fourth proportional to 6,421.19, 8,860.36 and 3,588.22
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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.