Home / 15,405.08-21,258.84-8,690.52

Finding the Fourth Proportional to 15,405.08, 21,258.84 and 8,690.52

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Solution

The fourth proportional to 15,405.08, 21,258.84 and 8,690.52 is: 11,992.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.08 : 21,258.84 = 8,690.52 : x
  2. Step 2: Convert to fraction form
    15,405.08/21,258.84 = 8,690.52/x
  3. Step 3: Cross multiply
    15,405.08x = 21,258.84 × 8,690.52
  4. Step 4: Simplify right side
    15,405.08x = 184,750,374.20
  5. Step 5: Solve for x
    x = 184,750,374.20/15,405.08
  6. Step 6: Final answer
    x = 11,992.82

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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.