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Finding the Fourth Proportional to 13,423.51, 18,526.08 and 8,119.90

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Solution

The fourth proportional to 13,423.51, 18,526.08 and 8,119.90 is: 11,206.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.51 : 18,526.08 = 8,119.90 : x
  2. Step 2: Convert to fraction form
    13,423.51/18,526.08 = 8,119.90/x
  3. Step 3: Cross multiply
    13,423.51x = 18,526.08 × 8,119.90
  4. Step 4: Simplify right side
    13,423.51x = 150,429,916.99
  5. Step 5: Solve for x
    x = 150,429,916.99/13,423.51
  6. Step 6: Final answer
    x = 11,206.45

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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.