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Finding the Fourth Proportional to 13,743.01, 20,515.01 and 12,715.81

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Solution

The fourth proportional to 13,743.01, 20,515.01 and 12,715.81 is: 18,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,743.01 : 20,515.01 = 12,715.81 : x
  2. Step 2: Convert to fraction form
    13,743.01/20,515.01 = 12,715.81/x
  3. Step 3: Cross multiply
    13,743.01x = 20,515.01 × 12,715.81
  4. Step 4: Simplify right side
    13,743.01x = 260,864,969.31
  5. Step 5: Solve for x
    x = 260,864,969.31/13,743.01
  6. Step 6: Final answer
    x = 18,981.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.