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Finding the Fourth Proportional to 10,339.80, 15,509.70 and 9,367.80

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Solution

The fourth proportional to 10,339.80, 15,509.70 and 9,367.80 is: 14,051.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,339.80 : 15,509.70 = 9,367.80 : x
  2. Step 2: Convert to fraction form
    10,339.80/15,509.70 = 9,367.80/x
  3. Step 3: Cross multiply
    10,339.80x = 15,509.70 × 9,367.80
  4. Step 4: Simplify right side
    10,339.80x = 145,291,767.66
  5. Step 5: Solve for x
    x = 145,291,767.66/10,339.80
  6. Step 6: Final answer
    x = 14,051.70

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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.