Home / 13,423.71-18,526.18-8,121.45

Finding the Fourth Proportional to 13,423.71, 18,526.18 and 8,121.45

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Solution

The fourth proportional to 13,423.71, 18,526.18 and 8,121.45 is: 11,208.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.71 : 18,526.18 = 8,121.45 : x
  2. Step 2: Convert to fraction form
    13,423.71/18,526.18 = 8,121.45/x
  3. Step 3: Cross multiply
    13,423.71x = 18,526.18 × 8,121.45
  4. Step 4: Simplify right side
    13,423.71x = 150,459,444.56
  5. Step 5: Solve for x
    x = 150,459,444.56/13,423.71
  6. Step 6: Final answer
    x = 11,208.48

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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.