Home / 21,156.44-29,188.07-12,658.76

Finding the Fourth Proportional to 21,156.44, 29,188.07 and 12,658.76

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Solution

The fourth proportional to 21,156.44, 29,188.07 and 12,658.76 is: 17,464.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.44 : 29,188.07 = 12,658.76 : x
  2. Step 2: Convert to fraction form
    21,156.44/29,188.07 = 12,658.76/x
  3. Step 3: Cross multiply
    21,156.44x = 29,188.07 × 12,658.76
  4. Step 4: Simplify right side
    21,156.44x = 369,484,563.76
  5. Step 5: Solve for x
    x = 369,484,563.76/21,156.44
  6. Step 6: Final answer
    x = 17,464.41

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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.