Home / 15,525.07-21,438.83-9,861.65

Finding the Fourth Proportional to 15,525.07, 21,438.83 and 9,861.65

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Solution

The fourth proportional to 15,525.07, 21,438.83 and 9,861.65 is: 13,618.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,525.07 : 21,438.83 = 9,861.65 : x
  2. Step 2: Convert to fraction form
    15,525.07/21,438.83 = 9,861.65/x
  3. Step 3: Cross multiply
    15,525.07x = 21,438.83 × 9,861.65
  4. Step 4: Simplify right side
    15,525.07x = 211,422,130.68
  5. Step 5: Solve for x
    x = 211,422,130.68/15,525.07
  6. Step 6: Final answer
    x = 13,618.11

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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.