Home / 21,156.70-29,182.98-13,612.84

Finding the Fourth Proportional to 21,156.70, 29,182.98 and 13,612.84

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Solution

The fourth proportional to 21,156.70, 29,182.98 and 13,612.84 is: 18,777.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.70 : 29,182.98 = 13,612.84 : x
  2. Step 2: Convert to fraction form
    21,156.70/29,182.98 = 13,612.84/x
  3. Step 3: Cross multiply
    21,156.70x = 29,182.98 × 13,612.84
  4. Step 4: Simplify right side
    21,156.70x = 397,263,237.46
  5. Step 5: Solve for x
    x = 397,263,237.46/21,156.70
  6. Step 6: Final answer
    x = 18,777.18

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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.