Home / 21,729.28-32,637.44-12,981.12

Finding the Fourth Proportional to 21,729.28, 32,637.44 and 12,981.12

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Solution

The fourth proportional to 21,729.28, 32,637.44 and 12,981.12 is: 19,497.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.28 : 32,637.44 = 12,981.12 : x
  2. Step 2: Convert to fraction form
    21,729.28/32,637.44 = 12,981.12/x
  3. Step 3: Cross multiply
    21,729.28x = 32,637.44 × 12,981.12
  4. Step 4: Simplify right side
    21,729.28x = 423,670,525.13
  5. Step 5: Solve for x
    x = 423,670,525.13/21,729.28
  6. Step 6: Final answer
    x = 19,497.68

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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.