Home / 20,209.40-30,303.30-8,509.40

Finding the Fourth Proportional to 20,209.40, 30,303.30 and 8,509.40

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Solution

The fourth proportional to 20,209.40, 30,303.30 and 8,509.40 is: 12,759.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.40 : 30,303.30 = 8,509.40 : x
  2. Step 2: Convert to fraction form
    20,209.40/30,303.30 = 8,509.40/x
  3. Step 3: Cross multiply
    20,209.40x = 30,303.30 × 8,509.40
  4. Step 4: Simplify right side
    20,209.40x = 257,862,901.02
  5. Step 5: Solve for x
    x = 257,862,901.02/20,209.40
  6. Step 6: Final answer
    x = 12,759.55

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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.