Home / 20,749.94-31,124.75-12,432.32

Finding the Fourth Proportional to 20,749.94, 31,124.75 and 12,432.32

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Solution

The fourth proportional to 20,749.94, 31,124.75 and 12,432.32 is: 18,648.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.94 : 31,124.75 = 12,432.32 : x
  2. Step 2: Convert to fraction form
    20,749.94/31,124.75 = 12,432.32/x
  3. Step 3: Cross multiply
    20,749.94x = 31,124.75 × 12,432.32
  4. Step 4: Simplify right side
    20,749.94x = 386,952,851.92
  5. Step 5: Solve for x
    x = 386,952,851.92/20,749.94
  6. Step 6: Final answer
    x = 18,648.38

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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.