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Finding the Fourth Proportional to 15,819.60, 23,729.40 and 9,987.60

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Solution

The fourth proportional to 15,819.60, 23,729.40 and 9,987.60 is: 14,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819.60 : 23,729.40 = 9,987.60 : x
  2. Step 2: Convert to fraction form
    15,819.60/23,729.40 = 9,987.60/x
  3. Step 3: Cross multiply
    15,819.60x = 23,729.40 × 9,987.60
  4. Step 4: Simplify right side
    15,819.60x = 236,999,755.44
  5. Step 5: Solve for x
    x = 236,999,755.44/15,819.60
  6. Step 6: Final answer
    x = 14,981.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.