Home / 20,315.52-28,020.60-13,589.28

Finding the Fourth Proportional to 20,315.52, 28,020.60 and 13,589.28

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Solution

The fourth proportional to 20,315.52, 28,020.60 and 13,589.28 is: 18,743.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.52 : 28,020.60 = 13,589.28 : x
  2. Step 2: Convert to fraction form
    20,315.52/28,020.60 = 13,589.28/x
  3. Step 3: Cross multiply
    20,315.52x = 28,020.60 × 13,589.28
  4. Step 4: Simplify right side
    20,315.52x = 380,779,779.17
  5. Step 5: Solve for x
    x = 380,779,779.17/20,315.52
  6. Step 6: Final answer
    x = 18,743.29

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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.