Home / 21,122.91-29,153.61-15,089.49

Finding the Fourth Proportional to 21,122.91, 29,153.61 and 15,089.49

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Solution

The fourth proportional to 21,122.91, 29,153.61 and 15,089.49 is: 20,826.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.91 : 29,153.61 = 15,089.49 : x
  2. Step 2: Convert to fraction form
    21,122.91/29,153.61 = 15,089.49/x
  3. Step 3: Cross multiply
    21,122.91x = 29,153.61 × 15,089.49
  4. Step 4: Simplify right side
    21,122.91x = 439,913,106.56
  5. Step 5: Solve for x
    x = 439,913,106.56/21,122.91
  6. Step 6: Final answer
    x = 20,826.35

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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.