Home / 13,123.96-18,106.55-9,143.62

Finding the Fourth Proportional to 13,123.96, 18,106.55 and 9,143.62

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Solution

The fourth proportional to 13,123.96, 18,106.55 and 9,143.62 is: 12,615.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.96 : 18,106.55 = 9,143.62 : x
  2. Step 2: Convert to fraction form
    13,123.96/18,106.55 = 9,143.62/x
  3. Step 3: Cross multiply
    13,123.96x = 18,106.55 × 9,143.62
  4. Step 4: Simplify right side
    13,123.96x = 165,559,366.99
  5. Step 5: Solve for x
    x = 165,559,366.99/13,123.96
  6. Step 6: Final answer
    x = 12,615.05

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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.