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Finding the Fourth Proportional to 9,007.80, 13,501.80 and 3,161.40

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Solution

The fourth proportional to 9,007.80, 13,501.80 and 3,161.40 is: 4,738.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,007.80 : 13,501.80 = 3,161.40 : x
  2. Step 2: Convert to fraction form
    9,007.80/13,501.80 = 3,161.40/x
  3. Step 3: Cross multiply
    9,007.80x = 13,501.80 × 3,161.40
  4. Step 4: Simplify right side
    9,007.80x = 42,684,590.52
  5. Step 5: Solve for x
    x = 42,684,590.52/9,007.80
  6. Step 6: Final answer
    x = 4,738.63

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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.