Home / 20,288.20-30,417.90-7,803.40

Finding the Fourth Proportional to 20,288.20, 30,417.90 and 7,803.40

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Solution

The fourth proportional to 20,288.20, 30,417.90 and 7,803.40 is: 11,699.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.20 : 30,417.90 = 7,803.40 : x
  2. Step 2: Convert to fraction form
    20,288.20/30,417.90 = 7,803.40/x
  3. Step 3: Cross multiply
    20,288.20x = 30,417.90 × 7,803.40
  4. Step 4: Simplify right side
    20,288.20x = 237,363,040.86
  5. Step 5: Solve for x
    x = 237,363,040.86/20,288.20
  6. Step 6: Final answer
    x = 11,699.56

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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.