Home / 15,510.33-21,404.67-8,437.20

Finding the Fourth Proportional to 15,510.33, 21,404.67 and 8,437.20

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Solution

The fourth proportional to 15,510.33, 21,404.67 and 8,437.20 is: 11,643.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,510.33 : 21,404.67 = 8,437.20 : x
  2. Step 2: Convert to fraction form
    15,510.33/21,404.67 = 8,437.20/x
  3. Step 3: Cross multiply
    15,510.33x = 21,404.67 × 8,437.20
  4. Step 4: Simplify right side
    15,510.33x = 180,595,481.72
  5. Step 5: Solve for x
    x = 180,595,481.72/15,510.33
  6. Step 6: Final answer
    x = 11,643.56

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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.