Home / 20,970.50-28,939.17-12,017.77

Finding the Fourth Proportional to 20,970.50, 28,939.17 and 12,017.77

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Solution

The fourth proportional to 20,970.50, 28,939.17 and 12,017.77 is: 16,584.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.50 : 28,939.17 = 12,017.77 : x
  2. Step 2: Convert to fraction form
    20,970.50/28,939.17 = 12,017.77/x
  3. Step 3: Cross multiply
    20,970.50x = 28,939.17 × 12,017.77
  4. Step 4: Simplify right side
    20,970.50x = 347,784,261.77
  5. Step 5: Solve for x
    x = 347,784,261.77/20,970.50
  6. Step 6: Final answer
    x = 16,584.46

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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.