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Finding the Fourth Proportional to 18,960.40, 28,443.96 and 6,477.51

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Solution

The fourth proportional to 18,960.40, 28,443.96 and 6,477.51 is: 9,717.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960.40 : 28,443.96 = 6,477.51 : x
  2. Step 2: Convert to fraction form
    18,960.40/28,443.96 = 6,477.51/x
  3. Step 3: Cross multiply
    18,960.40x = 28,443.96 × 6,477.51
  4. Step 4: Simplify right side
    18,960.40x = 184,246,035.34
  5. Step 5: Solve for x
    x = 184,246,035.34/18,960.40
  6. Step 6: Final answer
    x = 9,717.41

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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.