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Finding the Fourth Proportional to 30,477.84, 45,720.36 and 12,937.92

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Solution

The fourth proportional to 30,477.84, 45,720.36 and 12,937.92 is: 19,408.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,477.84 : 45,720.36 = 12,937.92 : x
  2. Step 2: Convert to fraction form
    30,477.84/45,720.36 = 12,937.92/x
  3. Step 3: Cross multiply
    30,477.84x = 45,720.36 × 12,937.92
  4. Step 4: Simplify right side
    30,477.84x = 591,526,360.05
  5. Step 5: Solve for x
    x = 591,526,360.05/30,477.84
  6. Step 6: Final answer
    x = 19,408.41

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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.