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Finding the Fourth Proportional to 30,480.75, 45,681.03 and 12,928.86

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Solution

The fourth proportional to 30,480.75, 45,681.03 and 12,928.86 is: 19,376.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,480.75 : 45,681.03 = 12,928.86 : x
  2. Step 2: Convert to fraction form
    30,480.75/45,681.03 = 12,928.86/x
  3. Step 3: Cross multiply
    30,480.75x = 45,681.03 × 12,928.86
  4. Step 4: Simplify right side
    30,480.75x = 590,603,641.53
  5. Step 5: Solve for x
    x = 590,603,641.53/30,480.75
  6. Step 6: Final answer
    x = 19,376.28

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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.