Home / 15,620.85-21,558.05-8,908.58

Finding the Fourth Proportional to 15,620.85, 21,558.05 and 8,908.58

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Solution

The fourth proportional to 15,620.85, 21,558.05 and 8,908.58 is: 12,294.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,620.85 : 21,558.05 = 8,908.58 : x
  2. Step 2: Convert to fraction form
    15,620.85/21,558.05 = 8,908.58/x
  3. Step 3: Cross multiply
    15,620.85x = 21,558.05 × 8,908.58
  4. Step 4: Simplify right side
    15,620.85x = 192,051,655.83
  5. Step 5: Solve for x
    x = 192,051,655.83/15,620.85
  6. Step 6: Final answer
    x = 12,294.57

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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.