Home / 15,742.09-21,729.78-10,438.66

Finding the Fourth Proportional to 15,742.09, 21,729.78 and 10,438.66

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Solution

The fourth proportional to 15,742.09, 21,729.78 and 10,438.66 is: 14,409.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.09 : 21,729.78 = 10,438.66 : x
  2. Step 2: Convert to fraction form
    15,742.09/21,729.78 = 10,438.66/x
  3. Step 3: Cross multiply
    15,742.09x = 21,729.78 × 10,438.66
  4. Step 4: Simplify right side
    15,742.09x = 226,829,624.45
  5. Step 5: Solve for x
    x = 226,829,624.45/15,742.09
  6. Step 6: Final answer
    x = 14,409.12

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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.