Home / 20,335.65-28,054.92-12,779.56

Finding the Fourth Proportional to 20,335.65, 28,054.92 and 12,779.56

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Solution

The fourth proportional to 20,335.65, 28,054.92 and 12,779.56 is: 17,630.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.65 : 28,054.92 = 12,779.56 : x
  2. Step 2: Convert to fraction form
    20,335.65/28,054.92 = 12,779.56/x
  3. Step 3: Cross multiply
    20,335.65x = 28,054.92 × 12,779.56
  4. Step 4: Simplify right side
    20,335.65x = 358,529,533.44
  5. Step 5: Solve for x
    x = 358,529,533.44/20,335.65
  6. Step 6: Final answer
    x = 17,630.59

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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.