Home / 11,384.12-15,709.60-8,398.88

Finding the Fourth Proportional to 11,384.12, 15,709.60 and 8,398.88

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Solution

The fourth proportional to 11,384.12, 15,709.60 and 8,398.88 is: 11,590.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,384.12 : 15,709.60 = 8,398.88 : x
  2. Step 2: Convert to fraction form
    11,384.12/15,709.60 = 8,398.88/x
  3. Step 3: Cross multiply
    11,384.12x = 15,709.60 × 8,398.88
  4. Step 4: Simplify right side
    11,384.12x = 131,943,045.25
  5. Step 5: Solve for x
    x = 131,943,045.25/11,384.12
  6. Step 6: Final answer
    x = 11,590.10

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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.