Home / 15,389.76-21,381.12-15,205.44

Finding the Fourth Proportional to 15,389.76, 21,381.12 and 15,205.44

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Solution

The fourth proportional to 15,389.76, 21,381.12 and 15,205.44 is: 21,125.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.76 : 21,381.12 = 15,205.44 : x
  2. Step 2: Convert to fraction form
    15,389.76/21,381.12 = 15,205.44/x
  3. Step 3: Cross multiply
    15,389.76x = 21,381.12 × 15,205.44
  4. Step 4: Simplify right side
    15,389.76x = 325,109,337.29
  5. Step 5: Solve for x
    x = 325,109,337.29/15,389.76
  6. Step 6: Final answer
    x = 21,125.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.