Home / 20,779.52-28,674.60-12,822.32

Finding the Fourth Proportional to 20,779.52, 28,674.60 and 12,822.32

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Solution

The fourth proportional to 20,779.52, 28,674.60 and 12,822.32 is: 17,694.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.52 : 28,674.60 = 12,822.32 : x
  2. Step 2: Convert to fraction form
    20,779.52/28,674.60 = 12,822.32/x
  3. Step 3: Cross multiply
    20,779.52x = 28,674.60 × 12,822.32
  4. Step 4: Simplify right side
    20,779.52x = 367,674,897.07
  5. Step 5: Solve for x
    x = 367,674,897.07/20,779.52
  6. Step 6: Final answer
    x = 17,694.10

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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.