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Finding the Fourth Proportional to 6,139.69, 8,472.77 and 3,345.19

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Solution

The fourth proportional to 6,139.69, 8,472.77 and 3,345.19 is: 4,616.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.69 : 8,472.77 = 3,345.19 : x
  2. Step 2: Convert to fraction form
    6,139.69/8,472.77 = 3,345.19/x
  3. Step 3: Cross multiply
    6,139.69x = 8,472.77 × 3,345.19
  4. Step 4: Simplify right side
    6,139.69x = 28,343,000.11
  5. Step 5: Solve for x
    x = 28,343,000.11/6,139.69
  6. Step 6: Final answer
    x = 4,616.36

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Half scale
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Double scale
Find fourth proportional to 6,140.69, 8,474.15 and 3,346.19
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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.