Home / 20,601.84-28,430.55-11,170.38

Finding the Fourth Proportional to 20,601.84, 28,430.55 and 11,170.38

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Solution

The fourth proportional to 20,601.84, 28,430.55 and 11,170.38 is: 15,415.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,601.84 : 28,430.55 = 11,170.38 : x
  2. Step 2: Convert to fraction form
    20,601.84/28,430.55 = 11,170.38/x
  3. Step 3: Cross multiply
    20,601.84x = 28,430.55 × 11,170.38
  4. Step 4: Simplify right side
    20,601.84x = 317,580,047.11
  5. Step 5: Solve for x
    x = 317,580,047.11/20,601.84
  6. Step 6: Final answer
    x = 15,415.13

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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.