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Finding the Fourth Proportional to 28,083.48, 38,751.90 and 15,507.48

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Solution

The fourth proportional to 28,083.48, 38,751.90 and 15,507.48 is: 21,398.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,083.48 : 38,751.90 = 15,507.48 : x
  2. Step 2: Convert to fraction form
    28,083.48/38,751.90 = 15,507.48/x
  3. Step 3: Cross multiply
    28,083.48x = 38,751.90 × 15,507.48
  4. Step 4: Simplify right side
    28,083.48x = 600,944,314.21
  5. Step 5: Solve for x
    x = 600,944,314.21/28,083.48
  6. Step 6: Final answer
    x = 21,398.50

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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.