Home / 15,687.96-21,638.44-13,313.74

Finding the Fourth Proportional to 15,687.96, 21,638.44 and 13,313.74

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Solution

The fourth proportional to 15,687.96, 21,638.44 and 13,313.74 is: 18,363.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.96 : 21,638.44 = 13,313.74 : x
  2. Step 2: Convert to fraction form
    15,687.96/21,638.44 = 13,313.74/x
  3. Step 3: Cross multiply
    15,687.96x = 21,638.44 × 13,313.74
  4. Step 4: Simplify right side
    15,687.96x = 288,088,564.17
  5. Step 5: Solve for x
    x = 288,088,564.17/15,687.96
  6. Step 6: Final answer
    x = 18,363.67

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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.