Home / 20,109.55-30,157.32-8,259.95

Finding the Fourth Proportional to 20,109.55, 30,157.32 and 8,259.95

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Solution

The fourth proportional to 20,109.55, 30,157.32 and 8,259.95 is: 12,387.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.55 : 30,157.32 = 8,259.95 : x
  2. Step 2: Convert to fraction form
    20,109.55/30,157.32 = 8,259.95/x
  3. Step 3: Cross multiply
    20,109.55x = 30,157.32 × 8,259.95
  4. Step 4: Simplify right side
    20,109.55x = 249,097,955.33
  5. Step 5: Solve for x
    x = 249,097,955.33/20,109.55
  6. Step 6: Final answer
    x = 12,387.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.