Home / 20,346.12-28,078.65-12,387.06

Finding the Fourth Proportional to 20,346.12, 28,078.65 and 12,387.06

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Solution

The fourth proportional to 20,346.12, 28,078.65 and 12,387.06 is: 17,094.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,346.12 : 28,078.65 = 12,387.06 : x
  2. Step 2: Convert to fraction form
    20,346.12/28,078.65 = 12,387.06/x
  3. Step 3: Cross multiply
    20,346.12x = 28,078.65 × 12,387.06
  4. Step 4: Simplify right side
    20,346.12x = 347,811,922.27
  5. Step 5: Solve for x
    x = 347,811,922.27/20,346.12
  6. Step 6: Final answer
    x = 17,094.75

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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.