Home / 15,404.06-21,258.36-8,689.55

Finding the Fourth Proportional to 15,404.06, 21,258.36 and 8,689.55

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Solution

The fourth proportional to 15,404.06, 21,258.36 and 8,689.55 is: 11,992.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,404.06 : 21,258.36 = 8,689.55 : x
  2. Step 2: Convert to fraction form
    15,404.06/21,258.36 = 8,689.55/x
  3. Step 3: Cross multiply
    15,404.06x = 21,258.36 × 8,689.55
  4. Step 4: Simplify right side
    15,404.06x = 184,725,475.85
  5. Step 5: Solve for x
    x = 184,725,475.85/15,404.06
  6. Step 6: Final answer
    x = 11,992.00

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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.