Home / 20,969.16-28,937.14-11,408.92

Finding the Fourth Proportional to 20,969.16, 28,937.14 and 11,408.92

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Solution

The fourth proportional to 20,969.16, 28,937.14 and 11,408.92 is: 15,744.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.16 : 28,937.14 = 11,408.92 : x
  2. Step 2: Convert to fraction form
    20,969.16/28,937.14 = 11,408.92/x
  3. Step 3: Cross multiply
    20,969.16x = 28,937.14 × 11,408.92
  4. Step 4: Simplify right side
    20,969.16x = 330,141,515.29
  5. Step 5: Solve for x
    x = 330,141,515.29/20,969.16
  6. Step 6: Final answer
    x = 15,744.15

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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.