Home / 20,823.50-28,736.44-11,392.14

Finding the Fourth Proportional to 20,823.50, 28,736.44 and 11,392.14

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Solution

The fourth proportional to 20,823.50, 28,736.44 and 11,392.14 is: 15,721.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.50 : 28,736.44 = 11,392.14 : x
  2. Step 2: Convert to fraction form
    20,823.50/28,736.44 = 11,392.14/x
  3. Step 3: Cross multiply
    20,823.50x = 28,736.44 × 11,392.14
  4. Step 4: Simplify right side
    20,823.50x = 327,369,547.58
  5. Step 5: Solve for x
    x = 327,369,547.58/20,823.50
  6. Step 6: Final answer
    x = 15,721.16

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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.