Home / 15,762.25-21,751.91-8,688.82

Finding the Fourth Proportional to 15,762.25, 21,751.91 and 8,688.82

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Solution

The fourth proportional to 15,762.25, 21,751.91 and 8,688.82 is: 11,990.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,762.25 : 21,751.91 = 8,688.82 : x
  2. Step 2: Convert to fraction form
    15,762.25/21,751.91 = 8,688.82/x
  3. Step 3: Cross multiply
    15,762.25x = 21,751.91 × 8,688.82
  4. Step 4: Simplify right side
    15,762.25x = 188,998,430.65
  5. Step 5: Solve for x
    x = 188,998,430.65/15,762.25
  6. Step 6: Final answer
    x = 11,990.57

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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.