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Finding the Fourth Proportional to 28,803.65, 39,746.22 and 17,321.90

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Solution

The fourth proportional to 28,803.65, 39,746.22 and 17,321.90 is: 23,902.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,803.65 : 39,746.22 = 17,321.90 : x
  2. Step 2: Convert to fraction form
    28,803.65/39,746.22 = 17,321.90/x
  3. Step 3: Cross multiply
    28,803.65x = 39,746.22 × 17,321.90
  4. Step 4: Simplify right side
    28,803.65x = 688,479,849.49
  5. Step 5: Solve for x
    x = 688,479,849.49/28,803.65
  6. Step 6: Final answer
    x = 23,902.53

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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.