Home / 21,153.68-29,193.12-11,722.28

Finding the Fourth Proportional to 21,153.68, 29,193.12 and 11,722.28

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Solution

The fourth proportional to 21,153.68, 29,193.12 and 11,722.28 is: 16,177.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.68 : 29,193.12 = 11,722.28 : x
  2. Step 2: Convert to fraction form
    21,153.68/29,193.12 = 11,722.28/x
  3. Step 3: Cross multiply
    21,153.68x = 29,193.12 × 11,722.28
  4. Step 4: Simplify right side
    21,153.68x = 342,209,926.71
  5. Step 5: Solve for x
    x = 342,209,926.71/21,153.68
  6. Step 6: Final answer
    x = 16,177.32

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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.