Home / 21,656.60-29,885.82-12,225.35

Finding the Fourth Proportional to 21,656.60, 29,885.82 and 12,225.35

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Solution

The fourth proportional to 21,656.60, 29,885.82 and 12,225.35 is: 16,870.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.60 : 29,885.82 = 12,225.35 : x
  2. Step 2: Convert to fraction form
    21,656.60/29,885.82 = 12,225.35/x
  3. Step 3: Cross multiply
    21,656.60x = 29,885.82 × 12,225.35
  4. Step 4: Simplify right side
    21,656.60x = 365,364,609.54
  5. Step 5: Solve for x
    x = 365,364,609.54/21,656.60
  6. Step 6: Final answer
    x = 16,870.82

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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.