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Finding the Fourth Proportional to 15,013.53, 20,719.95 and 8,725.50

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Solution

The fourth proportional to 15,013.53, 20,719.95 and 8,725.50 is: 12,041.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.53 : 20,719.95 = 8,725.50 : x
  2. Step 2: Convert to fraction form
    15,013.53/20,719.95 = 8,725.50/x
  3. Step 3: Cross multiply
    15,013.53x = 20,719.95 × 8,725.50
  4. Step 4: Simplify right side
    15,013.53x = 180,791,923.73
  5. Step 5: Solve for x
    x = 180,791,923.73/15,013.53
  6. Step 6: Final answer
    x = 12,041.93

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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.