Home / 20,885.45-28,805.13-18,362.16

Finding the Fourth Proportional to 20,885.45, 28,805.13 and 18,362.16

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Solution

The fourth proportional to 20,885.45, 28,805.13 and 18,362.16 is: 25,325.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.45 : 28,805.13 = 18,362.16 : x
  2. Step 2: Convert to fraction form
    20,885.45/28,805.13 = 18,362.16/x
  3. Step 3: Cross multiply
    20,885.45x = 28,805.13 × 18,362.16
  4. Step 4: Simplify right side
    20,885.45x = 528,924,405.88
  5. Step 5: Solve for x
    x = 528,924,405.88/20,885.45
  6. Step 6: Final answer
    x = 25,325.02

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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.