Home / 21,656.46-29,885.31-12,225.90

Finding the Fourth Proportional to 21,656.46, 29,885.31 and 12,225.90

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Solution

The fourth proportional to 21,656.46, 29,885.31 and 12,225.90 is: 16,871.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.46 : 29,885.31 = 12,225.90 : x
  2. Step 2: Convert to fraction form
    21,656.46/29,885.31 = 12,225.90/x
  3. Step 3: Cross multiply
    21,656.46x = 29,885.31 × 12,225.90
  4. Step 4: Simplify right side
    21,656.46x = 365,374,811.53
  5. Step 5: Solve for x
    x = 365,374,811.53/21,656.46
  6. Step 6: Final answer
    x = 16,871.40

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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.