Home / 21,156.54-29,188.18-13,607.04

Finding the Fourth Proportional to 21,156.54, 29,188.18 and 13,607.04

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Solution

The fourth proportional to 21,156.54, 29,188.18 and 13,607.04 is: 18,772.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.54 : 29,188.18 = 13,607.04 : x
  2. Step 2: Convert to fraction form
    21,156.54/29,188.18 = 13,607.04/x
  3. Step 3: Cross multiply
    21,156.54x = 29,188.18 × 13,607.04
  4. Step 4: Simplify right side
    21,156.54x = 397,164,732.79
  5. Step 5: Solve for x
    x = 397,164,732.79/21,156.54
  6. Step 6: Final answer
    x = 18,772.67

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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.