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Finding the Fourth Proportional to 15,037.61, 20,757.38 and 8,749.99

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Solution

The fourth proportional to 15,037.61, 20,757.38 and 8,749.99 is: 12,078.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,037.61 : 20,757.38 = 8,749.99 : x
  2. Step 2: Convert to fraction form
    15,037.61/20,757.38 = 8,749.99/x
  3. Step 3: Cross multiply
    15,037.61x = 20,757.38 × 8,749.99
  4. Step 4: Simplify right side
    15,037.61x = 181,626,719.89
  5. Step 5: Solve for x
    x = 181,626,719.89/15,037.61
  6. Step 6: Final answer
    x = 12,078.16

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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.