Home / 8,690.10-11,992.35-4,711.20

Finding the Fourth Proportional to 8,690.10, 11,992.35 and 4,711.20

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Solution

The fourth proportional to 8,690.10, 11,992.35 and 4,711.20 is: 6,501.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.10 : 11,992.35 = 4,711.20 : x
  2. Step 2: Convert to fraction form
    8,690.10/11,992.35 = 4,711.20/x
  3. Step 3: Cross multiply
    8,690.10x = 11,992.35 × 4,711.20
  4. Step 4: Simplify right side
    8,690.10x = 56,498,359.32
  5. Step 5: Solve for x
    x = 56,498,359.32/8,690.10
  6. Step 6: Final answer
    x = 6,501.46

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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.