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Finding the Fourth Proportional to 13,253.78, 18,289.05 and 7,951.52

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Solution

The fourth proportional to 13,253.78, 18,289.05 and 7,951.52 is: 10,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,253.78 : 18,289.05 = 7,951.52 : x
  2. Step 2: Convert to fraction form
    13,253.78/18,289.05 = 7,951.52/x
  3. Step 3: Cross multiply
    13,253.78x = 18,289.05 × 7,951.52
  4. Step 4: Simplify right side
    13,253.78x = 145,425,746.86
  5. Step 5: Solve for x
    x = 145,425,746.86/13,253.78
  6. Step 6: Final answer
    x = 10,972.40

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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.