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Finding the Fourth Proportional to 28,058, 38,720.88 and 15,483.56

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Solution

The fourth proportional to 28,058, 38,720.88 and 15,483.56 is: 21,367.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,058 : 38,720.88 = 15,483.56 : x
  2. Step 2: Convert to fraction form
    28,058/38,720.88 = 15,483.56/x
  3. Step 3: Cross multiply
    28,058x = 38,720.88 × 15,483.56
  4. Step 4: Simplify right side
    28,058x = 599,537,068.73
  5. Step 5: Solve for x
    x = 599,537,068.73/28,058
  6. Step 6: Final answer
    x = 21,367.78

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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.