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Finding the Fourth Proportional to 15,027.76, 20,719.40 and 9,640.68

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Solution

The fourth proportional to 15,027.76, 20,719.40 and 9,640.68 is: 13,292.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,027.76 : 20,719.40 = 9,640.68 : x
  2. Step 2: Convert to fraction form
    15,027.76/20,719.40 = 9,640.68/x
  3. Step 3: Cross multiply
    15,027.76x = 20,719.40 × 9,640.68
  4. Step 4: Simplify right side
    15,027.76x = 199,749,105.19
  5. Step 5: Solve for x
    x = 199,749,105.19/15,027.76
  6. Step 6: Final answer
    x = 13,292.01

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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.