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Finding the Fourth Proportional to 10,368.86, 15,559.74 and 4,212.86

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Solution

The fourth proportional to 10,368.86, 15,559.74 and 4,212.86 is: 6,321.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,368.86 : 15,559.74 = 4,212.86 : x
  2. Step 2: Convert to fraction form
    10,368.86/15,559.74 = 4,212.86/x
  3. Step 3: Cross multiply
    10,368.86x = 15,559.74 × 4,212.86
  4. Step 4: Simplify right side
    10,368.86x = 65,551,006.26
  5. Step 5: Solve for x
    x = 65,551,006.26/10,368.86
  6. Step 6: Final answer
    x = 6,321.91

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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.