Home / 19,771.12-27,286.65-12,970.86

Finding the Fourth Proportional to 19,771.12, 27,286.65 and 12,970.86

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Solution

The fourth proportional to 19,771.12, 27,286.65 and 12,970.86 is: 17,901.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,771.12 : 27,286.65 = 12,970.86 : x
  2. Step 2: Convert to fraction form
    19,771.12/27,286.65 = 12,970.86/x
  3. Step 3: Cross multiply
    19,771.12x = 27,286.65 × 12,970.86
  4. Step 4: Simplify right side
    19,771.12x = 353,931,317.02
  5. Step 5: Solve for x
    x = 353,931,317.02/19,771.12
  6. Step 6: Final answer
    x = 17,901.43

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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.