Home / 15,512.29-21,406.84-8,438.72

Finding the Fourth Proportional to 15,512.29, 21,406.84 and 8,438.72

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Solution

The fourth proportional to 15,512.29, 21,406.84 and 8,438.72 is: 11,645.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,512.29 : 21,406.84 = 8,438.72 : x
  2. Step 2: Convert to fraction form
    15,512.29/21,406.84 = 8,438.72/x
  3. Step 3: Cross multiply
    15,512.29x = 21,406.84 × 8,438.72
  4. Step 4: Simplify right side
    15,512.29x = 180,646,200.71
  5. Step 5: Solve for x
    x = 180,646,200.71/15,512.29
  6. Step 6: Final answer
    x = 11,645.36

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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.