Home / 20,315.52-28,032.90-11,360.78

Finding the Fourth Proportional to 20,315.52, 28,032.90 and 11,360.78

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Solution

The fourth proportional to 20,315.52, 28,032.90 and 11,360.78 is: 15,676.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.52 : 28,032.90 = 11,360.78 : x
  2. Step 2: Convert to fraction form
    20,315.52/28,032.90 = 11,360.78/x
  3. Step 3: Cross multiply
    20,315.52x = 28,032.90 × 11,360.78
  4. Step 4: Simplify right side
    20,315.52x = 318,475,626.84
  5. Step 5: Solve for x
    x = 318,475,626.84/20,315.52
  6. Step 6: Final answer
    x = 15,676.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.