Home / 20,348.10-30,485.70-18,015.30

Finding the Fourth Proportional to 20,348.10, 30,485.70 and 18,015.30

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Solution

The fourth proportional to 20,348.10, 30,485.70 and 18,015.30 is: 26,990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,348.10 : 30,485.70 = 18,015.30 : x
  2. Step 2: Convert to fraction form
    20,348.10/30,485.70 = 18,015.30/x
  3. Step 3: Cross multiply
    20,348.10x = 30,485.70 × 18,015.30
  4. Step 4: Simplify right side
    20,348.10x = 549,209,031.21
  5. Step 5: Solve for x
    x = 549,209,031.21/20,348.10
  6. Step 6: Final answer
    x = 26,990.68

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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.