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Finding the Fourth Proportional to 18,649.69, 25,711.27 and 12,670.98

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Solution

The fourth proportional to 18,649.69, 25,711.27 and 12,670.98 is: 17,468.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649.69 : 25,711.27 = 12,670.98 : x
  2. Step 2: Convert to fraction form
    18,649.69/25,711.27 = 12,670.98/x
  3. Step 3: Cross multiply
    18,649.69x = 25,711.27 × 12,670.98
  4. Step 4: Simplify right side
    18,649.69x = 325,787,075.75
  5. Step 5: Solve for x
    x = 325,787,075.75/18,649.69
  6. Step 6: Final answer
    x = 17,468.76

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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.