Home / 20,312.54-28,032.74-11,360.88

Finding the Fourth Proportional to 20,312.54, 28,032.74 and 11,360.88

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Solution

The fourth proportional to 20,312.54, 28,032.74 and 11,360.88 is: 15,678.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,312.54 : 28,032.74 = 11,360.88 : x
  2. Step 2: Convert to fraction form
    20,312.54/28,032.74 = 11,360.88/x
  3. Step 3: Cross multiply
    20,312.54x = 28,032.74 × 11,360.88
  4. Step 4: Simplify right side
    20,312.54x = 318,476,644.92
  5. Step 5: Solve for x
    x = 318,476,644.92/20,312.54
  6. Step 6: Final answer
    x = 15,678.82

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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.