Home / 20,382.03-28,140.86-12,736.89

Finding the Fourth Proportional to 20,382.03, 28,140.86 and 12,736.89

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Solution

The fourth proportional to 20,382.03, 28,140.86 and 12,736.89 is: 17,585.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.03 : 28,140.86 = 12,736.89 : x
  2. Step 2: Convert to fraction form
    20,382.03/28,140.86 = 12,736.89/x
  3. Step 3: Cross multiply
    20,382.03x = 28,140.86 × 12,736.89
  4. Step 4: Simplify right side
    20,382.03x = 358,427,070.17
  5. Step 5: Solve for x
    x = 358,427,070.17/20,382.03
  6. Step 6: Final answer
    x = 17,585.45

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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.