Home / 13,445.50-18,551.76-8,139.19

Finding the Fourth Proportional to 13,445.50, 18,551.76 and 8,139.19

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Solution

The fourth proportional to 13,445.50, 18,551.76 and 8,139.19 is: 11,230.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.50 : 18,551.76 = 8,139.19 : x
  2. Step 2: Convert to fraction form
    13,445.50/18,551.76 = 8,139.19/x
  3. Step 3: Cross multiply
    13,445.50x = 18,551.76 × 8,139.19
  4. Step 4: Simplify right side
    13,445.50x = 150,996,299.47
  5. Step 5: Solve for x
    x = 150,996,299.47/13,445.50
  6. Step 6: Final answer
    x = 11,230.25

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Double scale
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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.