Home / 21,110.28-29,127.36-12,156.13

Finding the Fourth Proportional to 21,110.28, 29,127.36 and 12,156.13

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Solution

The fourth proportional to 21,110.28, 29,127.36 and 12,156.13 is: 16,772.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.28 : 29,127.36 = 12,156.13 : x
  2. Step 2: Convert to fraction form
    21,110.28/29,127.36 = 12,156.13/x
  3. Step 3: Cross multiply
    21,110.28x = 29,127.36 × 12,156.13
  4. Step 4: Simplify right side
    21,110.28x = 354,075,974.72
  5. Step 5: Solve for x
    x = 354,075,974.72/21,110.28
  6. Step 6: Final answer
    x = 16,772.68

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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.