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Finding the Fourth Proportional to 28,280.85, 42,403.83 and 9,559.11

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Solution

The fourth proportional to 28,280.85, 42,403.83 and 9,559.11 is: 14,332.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,280.85 : 42,403.83 = 9,559.11 : x
  2. Step 2: Convert to fraction form
    28,280.85/42,403.83 = 9,559.11/x
  3. Step 3: Cross multiply
    28,280.85x = 42,403.83 × 9,559.11
  4. Step 4: Simplify right side
    28,280.85x = 405,342,875.39
  5. Step 5: Solve for x
    x = 405,342,875.39/28,280.85
  6. Step 6: Final answer
    x = 14,332.77

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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.