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Finding the Fourth Proportional to 28,923.60, 43,401.60 and 12,280.80

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Solution

The fourth proportional to 28,923.60, 43,401.60 and 12,280.80 is: 18,428.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,923.60 : 43,401.60 = 12,280.80 : x
  2. Step 2: Convert to fraction form
    28,923.60/43,401.60 = 12,280.80/x
  3. Step 3: Cross multiply
    28,923.60x = 43,401.60 × 12,280.80
  4. Step 4: Simplify right side
    28,923.60x = 533,006,369.28
  5. Step 5: Solve for x
    x = 533,006,369.28/28,923.60
  6. Step 6: Final answer
    x = 18,428.08

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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.