Home / 20,669.70-28,524.76-12,707.40

Finding the Fourth Proportional to 20,669.70, 28,524.76 and 12,707.40

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Solution

The fourth proportional to 20,669.70, 28,524.76 and 12,707.40 is: 17,536.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.70 : 28,524.76 = 12,707.40 : x
  2. Step 2: Convert to fraction form
    20,669.70/28,524.76 = 12,707.40/x
  3. Step 3: Cross multiply
    20,669.70x = 28,524.76 × 12,707.40
  4. Step 4: Simplify right side
    20,669.70x = 362,475,535.22
  5. Step 5: Solve for x
    x = 362,475,535.22/20,669.70
  6. Step 6: Final answer
    x = 17,536.56

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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.