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Finding the Fourth Proportional to 9,999.38, 14,999.02 and 9,390.40

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Solution

The fourth proportional to 9,999.38, 14,999.02 and 9,390.40 is: 14,085.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,999.38 : 14,999.02 = 9,390.40 : x
  2. Step 2: Convert to fraction form
    9,999.38/14,999.02 = 9,390.40/x
  3. Step 3: Cross multiply
    9,999.38x = 14,999.02 × 9,390.40
  4. Step 4: Simplify right side
    9,999.38x = 140,846,797.41
  5. Step 5: Solve for x
    x = 140,846,797.41/9,999.38
  6. Step 6: Final answer
    x = 14,085.55

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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.