Home / 15,404.40-21,257.40-8,690.16

Finding the Fourth Proportional to 15,404.40, 21,257.40 and 8,690.16

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Solution

The fourth proportional to 15,404.40, 21,257.40 and 8,690.16 is: 11,992.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,404.40 : 21,257.40 = 8,690.16 : x
  2. Step 2: Convert to fraction form
    15,404.40/21,257.40 = 8,690.16/x
  3. Step 3: Cross multiply
    15,404.40x = 21,257.40 × 8,690.16
  4. Step 4: Simplify right side
    15,404.40x = 184,730,207.18
  5. Step 5: Solve for x
    x = 184,730,207.18/15,404.40
  6. Step 6: Final answer
    x = 11,992.04

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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.