Home / 21,657.60-29,887.32-12,225.84

Finding the Fourth Proportional to 21,657.60, 29,887.32 and 12,225.84

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Solution

The fourth proportional to 21,657.60, 29,887.32 and 12,225.84 is: 16,871.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,657.60 : 29,887.32 = 12,225.84 : x
  2. Step 2: Convert to fraction form
    21,657.60/29,887.32 = 12,225.84/x
  3. Step 3: Cross multiply
    21,657.60x = 29,887.32 × 12,225.84
  4. Step 4: Simplify right side
    21,657.60x = 365,397,592.35
  5. Step 5: Solve for x
    x = 365,397,592.35/21,657.60
  6. Step 6: Final answer
    x = 16,871.56

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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.