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Finding the Fourth Proportional to 18,700.25, 25,803.79 and 10,742.47

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Solution

The fourth proportional to 18,700.25, 25,803.79 and 10,742.47 is: 14,823.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.25 : 25,803.79 = 10,742.47 : x
  2. Step 2: Convert to fraction form
    18,700.25/25,803.79 = 10,742.47/x
  3. Step 3: Cross multiply
    18,700.25x = 25,803.79 × 10,742.47
  4. Step 4: Simplify right side
    18,700.25x = 277,196,493.74
  5. Step 5: Solve for x
    x = 277,196,493.74/18,700.25
  6. Step 6: Final answer
    x = 14,823.14

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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.