Home / 21,361.21-32,031.33-12,478.77

Finding the Fourth Proportional to 21,361.21, 32,031.33 and 12,478.77

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Solution

The fourth proportional to 21,361.21, 32,031.33 and 12,478.77 is: 18,712.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,361.21 : 32,031.33 = 12,478.77 : x
  2. Step 2: Convert to fraction form
    21,361.21/32,031.33 = 12,478.77/x
  3. Step 3: Cross multiply
    21,361.21x = 32,031.33 × 12,478.77
  4. Step 4: Simplify right side
    21,361.21x = 399,711,599.86
  5. Step 5: Solve for x
    x = 399,711,599.86/21,361.21
  6. Step 6: Final answer
    x = 18,712.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.