Home / 20,971.80-28,937.78-12,017.58

Finding the Fourth Proportional to 20,971.80, 28,937.78 and 12,017.58

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Solution

The fourth proportional to 20,971.80, 28,937.78 and 12,017.58 is: 16,582.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.80 : 28,937.78 = 12,017.58 : x
  2. Step 2: Convert to fraction form
    20,971.80/28,937.78 = 12,017.58/x
  3. Step 3: Cross multiply
    20,971.80x = 28,937.78 × 12,017.58
  4. Step 4: Simplify right side
    20,971.80x = 347,762,086.17
  5. Step 5: Solve for x
    x = 347,762,086.17/20,971.80
  6. Step 6: Final answer
    x = 16,582.37

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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.