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Finding the Fourth Proportional to 15,014.07, 20,719.41 and 8,390.07

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Solution

The fourth proportional to 15,014.07, 20,719.41 and 8,390.07 is: 11,578.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,014.07 : 20,719.41 = 8,390.07 : x
  2. Step 2: Convert to fraction form
    15,014.07/20,719.41 = 8,390.07/x
  3. Step 3: Cross multiply
    15,014.07x = 20,719.41 × 8,390.07
  4. Step 4: Simplify right side
    15,014.07x = 173,837,154.71
  5. Step 5: Solve for x
    x = 173,837,154.71/15,014.07
  6. Step 6: Final answer
    x = 11,578.29

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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.