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Finding the Fourth Proportional to 10,858.79, 14,985.12 and 5,890.79

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Solution

The fourth proportional to 10,858.79, 14,985.12 and 5,890.79 is: 8,129.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,858.79 : 14,985.12 = 5,890.79 : x
  2. Step 2: Convert to fraction form
    10,858.79/14,985.12 = 5,890.79/x
  3. Step 3: Cross multiply
    10,858.79x = 14,985.12 × 5,890.79
  4. Step 4: Simplify right side
    10,858.79x = 88,274,120.12
  5. Step 5: Solve for x
    x = 88,274,120.12/10,858.79
  6. Step 6: Final answer
    x = 8,129.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.