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Finding the Fourth Proportional to 10,625.80, 15,945.90 and 4,779.40

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Solution

The fourth proportional to 10,625.80, 15,945.90 and 4,779.40 is: 7,172.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,625.80 : 15,945.90 = 4,779.40 : x
  2. Step 2: Convert to fraction form
    10,625.80/15,945.90 = 4,779.40/x
  3. Step 3: Cross multiply
    10,625.80x = 15,945.90 × 4,779.40
  4. Step 4: Simplify right side
    10,625.80x = 76,211,834.46
  5. Step 5: Solve for x
    x = 76,211,834.46/10,625.80
  6. Step 6: Final answer
    x = 7,172.34

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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.