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Finding the Fourth Proportional to 15,124.39, 20,868.58 and 8,835.55

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Solution

The fourth proportional to 15,124.39, 20,868.58 and 8,835.55 is: 12,191.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,124.39 : 20,868.58 = 8,835.55 : x
  2. Step 2: Convert to fraction form
    15,124.39/20,868.58 = 8,835.55/x
  3. Step 3: Cross multiply
    15,124.39x = 20,868.58 × 8,835.55
  4. Step 4: Simplify right side
    15,124.39x = 184,385,233.50
  5. Step 5: Solve for x
    x = 184,385,233.50/15,124.39
  6. Step 6: Final answer
    x = 12,191.25

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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.