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Finding the Fourth Proportional to 15,125.51, 20,870.15 and 8,836.67

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Solution

The fourth proportional to 15,125.51, 20,870.15 and 8,836.67 is: 12,192.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,125.51 : 20,870.15 = 8,836.67 : x
  2. Step 2: Convert to fraction form
    15,125.51/20,870.15 = 8,836.67/x
  3. Step 3: Cross multiply
    15,125.51x = 20,870.15 × 8,836.67
  4. Step 4: Simplify right side
    15,125.51x = 184,422,584.22
  5. Step 5: Solve for x
    x = 184,422,584.22/15,125.51
  6. Step 6: Final answer
    x = 12,192.82

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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.