Home / 15,638.67-21,581.37-8,565.21

Finding the Fourth Proportional to 15,638.67, 21,581.37 and 8,565.21

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Solution

The fourth proportional to 15,638.67, 21,581.37 and 8,565.21 is: 11,819.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,638.67 : 21,581.37 = 8,565.21 : x
  2. Step 2: Convert to fraction form
    15,638.67/21,581.37 = 8,565.21/x
  3. Step 3: Cross multiply
    15,638.67x = 21,581.37 × 8,565.21
  4. Step 4: Simplify right side
    15,638.67x = 184,848,966.14
  5. Step 5: Solve for x
    x = 184,848,966.14/15,638.67
  6. Step 6: Final answer
    x = 11,819.99

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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.