Home / 20,922.34-28,865.88-12,427.06

Finding the Fourth Proportional to 20,922.34, 28,865.88 and 12,427.06

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Solution

The fourth proportional to 20,922.34, 28,865.88 and 12,427.06 is: 17,145.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.34 : 28,865.88 = 12,427.06 : x
  2. Step 2: Convert to fraction form
    20,922.34/28,865.88 = 12,427.06/x
  3. Step 3: Cross multiply
    20,922.34x = 28,865.88 × 12,427.06
  4. Step 4: Simplify right side
    20,922.34x = 358,718,022.71
  5. Step 5: Solve for x
    x = 358,718,022.71/20,922.34
  6. Step 6: Final answer
    x = 17,145.22

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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.