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Finding the Fourth Proportional to 15,123.94, 20,867.28 and 9,449.89

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Solution

The fourth proportional to 15,123.94, 20,867.28 and 9,449.89 is: 13,038.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,123.94 : 20,867.28 = 9,449.89 : x
  2. Step 2: Convert to fraction form
    15,123.94/20,867.28 = 9,449.89/x
  3. Step 3: Cross multiply
    15,123.94x = 20,867.28 × 9,449.89
  4. Step 4: Simplify right side
    15,123.94x = 197,193,500.60
  5. Step 5: Solve for x
    x = 197,193,500.60/15,123.94
  6. Step 6: Final answer
    x = 13,038.50

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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.