Home / 15,403.07-21,255.82-8,688.65

Finding the Fourth Proportional to 15,403.07, 21,255.82 and 8,688.65

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Solution

The fourth proportional to 15,403.07, 21,255.82 and 8,688.65 is: 11,990.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.07 : 21,255.82 = 8,688.65 : x
  2. Step 2: Convert to fraction form
    15,403.07/21,255.82 = 8,688.65/x
  3. Step 3: Cross multiply
    15,403.07x = 21,255.82 × 8,688.65
  4. Step 4: Simplify right side
    15,403.07x = 184,684,252.44
  5. Step 5: Solve for x
    x = 184,684,252.44/15,403.07
  6. Step 6: Final answer
    x = 11,990.09

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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.