Home / 15,688.14-21,649.90-8,615.22

Finding the Fourth Proportional to 15,688.14, 21,649.90 and 8,615.22

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Solution

The fourth proportional to 15,688.14, 21,649.90 and 8,615.22 is: 11,889.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.14 : 21,649.90 = 8,615.22 : x
  2. Step 2: Convert to fraction form
    15,688.14/21,649.90 = 8,615.22/x
  3. Step 3: Cross multiply
    15,688.14x = 21,649.90 × 8,615.22
  4. Step 4: Simplify right side
    15,688.14x = 186,518,716.37
  5. Step 5: Solve for x
    x = 186,518,716.37/15,688.14
  6. Step 6: Final answer
    x = 11,889.15

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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.