Home / 20,280.24-30,376.08-12,465.36

Finding the Fourth Proportional to 20,280.24, 30,376.08 and 12,465.36

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Solution

The fourth proportional to 20,280.24, 30,376.08 and 12,465.36 is: 18,670.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.24 : 30,376.08 = 12,465.36 : x
  2. Step 2: Convert to fraction form
    20,280.24/30,376.08 = 12,465.36/x
  3. Step 3: Cross multiply
    20,280.24x = 30,376.08 × 12,465.36
  4. Step 4: Simplify right side
    20,280.24x = 378,648,772.59
  5. Step 5: Solve for x
    x = 378,648,772.59/20,280.24
  6. Step 6: Final answer
    x = 18,670.82

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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.