Home / 8,139.64-12,176.02-6,499.39

Finding the Fourth Proportional to 8,139.64, 12,176.02 and 6,499.39

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Solution

The fourth proportional to 8,139.64, 12,176.02 and 6,499.39 is: 9,722.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.64 : 12,176.02 = 6,499.39 : x
  2. Step 2: Convert to fraction form
    8,139.64/12,176.02 = 6,499.39/x
  3. Step 3: Cross multiply
    8,139.64x = 12,176.02 × 6,499.39
  4. Step 4: Simplify right side
    8,139.64x = 79,136,702.63
  5. Step 5: Solve for x
    x = 79,136,702.63/8,139.64
  6. Step 6: Final answer
    x = 9,722.38

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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.