Home / 20,507.88-28,293.28-12,008.55

Finding the Fourth Proportional to 20,507.88, 28,293.28 and 12,008.55

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Solution

The fourth proportional to 20,507.88, 28,293.28 and 12,008.55 is: 16,567.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,507.88 : 28,293.28 = 12,008.55 : x
  2. Step 2: Convert to fraction form
    20,507.88/28,293.28 = 12,008.55/x
  3. Step 3: Cross multiply
    20,507.88x = 28,293.28 × 12,008.55
  4. Step 4: Simplify right side
    20,507.88x = 339,761,267.54
  5. Step 5: Solve for x
    x = 339,761,267.54/20,507.88
  6. Step 6: Final answer
    x = 16,567.35

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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.