Home / 20,934.30-28,885.23-12,439.02

Finding the Fourth Proportional to 20,934.30, 28,885.23 and 12,439.02

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Solution

The fourth proportional to 20,934.30, 28,885.23 and 12,439.02 is: 17,163.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.30 : 28,885.23 = 12,439.02 : x
  2. Step 2: Convert to fraction form
    20,934.30/28,885.23 = 12,439.02/x
  3. Step 3: Cross multiply
    20,934.30x = 28,885.23 × 12,439.02
  4. Step 4: Simplify right side
    20,934.30x = 359,303,953.67
  5. Step 5: Solve for x
    x = 359,303,953.67/20,934.30
  6. Step 6: Final answer
    x = 17,163.41

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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.