Home / 28,121.13-38,806.43-15,373.94

Finding the Fourth Proportional to 28,121.13, 38,806.43 and 15,373.94

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Solution

The fourth proportional to 28,121.13, 38,806.43 and 15,373.94 is: 21,215.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.13 : 38,806.43 = 15,373.94 : x
  2. Step 2: Convert to fraction form
    28,121.13/38,806.43 = 15,373.94/x
  3. Step 3: Cross multiply
    28,121.13x = 38,806.43 × 15,373.94
  4. Step 4: Simplify right side
    28,121.13x = 596,607,455.53
  5. Step 5: Solve for x
    x = 596,607,455.53/28,121.13
  6. Step 6: Final answer
    x = 21,215.63

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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.