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Finding the Fourth Proportional to 13,587.76, 18,750.72 and 7,923.76

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Solution

The fourth proportional to 13,587.76, 18,750.72 and 7,923.76 is: 10,934.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,587.76 : 18,750.72 = 7,923.76 : x
  2. Step 2: Convert to fraction form
    13,587.76/18,750.72 = 7,923.76/x
  3. Step 3: Cross multiply
    13,587.76x = 18,750.72 × 7,923.76
  4. Step 4: Simplify right side
    13,587.76x = 148,576,205.11
  5. Step 5: Solve for x
    x = 148,576,205.11/13,587.76
  6. Step 6: Final answer
    x = 10,934.56

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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.