Home / 15,688.82-21,650.46-8,615.10

Finding the Fourth Proportional to 15,688.82, 21,650.46 and 8,615.10

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Solution

The fourth proportional to 15,688.82, 21,650.46 and 8,615.10 is: 11,888.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.82 : 21,650.46 = 8,615.10 : x
  2. Step 2: Convert to fraction form
    15,688.82/21,650.46 = 8,615.10/x
  3. Step 3: Cross multiply
    15,688.82x = 21,650.46 × 8,615.10
  4. Step 4: Simplify right side
    15,688.82x = 186,520,877.95
  5. Step 5: Solve for x
    x = 186,520,877.95/15,688.82
  6. Step 6: Final answer
    x = 11,888.78

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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.