Home / 8,305.40-12,458.10-4,158.20

Finding the Fourth Proportional to 8,305.40, 12,458.10 and 4,158.20

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Solution

The fourth proportional to 8,305.40, 12,458.10 and 4,158.20 is: 6,237.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,305.40 : 12,458.10 = 4,158.20 : x
  2. Step 2: Convert to fraction form
    8,305.40/12,458.10 = 4,158.20/x
  3. Step 3: Cross multiply
    8,305.40x = 12,458.10 × 4,158.20
  4. Step 4: Simplify right side
    8,305.40x = 51,803,271.42
  5. Step 5: Solve for x
    x = 51,803,271.42/8,305.40
  6. Step 6: Final answer
    x = 6,237.30

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Half scale
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Similar ratio
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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.