Home / 18,719.51-28,068.32-12,805.49

Finding the Fourth Proportional to 18,719.51, 28,068.32 and 12,805.49

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Solution

The fourth proportional to 18,719.51, 28,068.32 and 12,805.49 is: 19,200.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.51 : 28,068.32 = 12,805.49 : x
  2. Step 2: Convert to fraction form
    18,719.51/28,068.32 = 12,805.49/x
  3. Step 3: Cross multiply
    18,719.51x = 28,068.32 × 12,805.49
  4. Step 4: Simplify right side
    18,719.51x = 359,428,693.26
  5. Step 5: Solve for x
    x = 359,428,693.26/18,719.51
  6. Step 6: Final answer
    x = 19,200.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.