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Finding the Fourth Proportional to 28,026, 38,675.96 and 15,279.32

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Solution

The fourth proportional to 28,026, 38,675.96 and 15,279.32 is: 21,085.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,026 : 38,675.96 = 15,279.32 : x
  2. Step 2: Convert to fraction form
    28,026/38,675.96 = 15,279.32/x
  3. Step 3: Cross multiply
    28,026x = 38,675.96 × 15,279.32
  4. Step 4: Simplify right side
    28,026x = 590,942,369.15
  5. Step 5: Solve for x
    x = 590,942,369.15/28,026
  6. Step 6: Final answer
    x = 21,085.51

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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.