Home / 20,272.18-30,406.77-7,124.68

Finding the Fourth Proportional to 20,272.18, 30,406.77 and 7,124.68

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Solution

The fourth proportional to 20,272.18, 30,406.77 and 7,124.68 is: 10,686.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.18 : 30,406.77 = 7,124.68 : x
  2. Step 2: Convert to fraction form
    20,272.18/30,406.77 = 7,124.68/x
  3. Step 3: Cross multiply
    20,272.18x = 30,406.77 × 7,124.68
  4. Step 4: Simplify right side
    20,272.18x = 216,638,506.08
  5. Step 5: Solve for x
    x = 216,638,506.08/20,272.18
  6. Step 6: Final answer
    x = 10,686.49

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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.