Home / 15,315.45-21,135.41-8,509.52

Finding the Fourth Proportional to 15,315.45, 21,135.41 and 8,509.52

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Solution

The fourth proportional to 15,315.45, 21,135.41 and 8,509.52 is: 11,743.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.45 : 21,135.41 = 8,509.52 : x
  2. Step 2: Convert to fraction form
    15,315.45/21,135.41 = 8,509.52/x
  3. Step 3: Cross multiply
    15,315.45x = 21,135.41 × 8,509.52
  4. Step 4: Simplify right side
    15,315.45x = 179,852,194.10
  5. Step 5: Solve for x
    x = 179,852,194.10/15,315.45
  6. Step 6: Final answer
    x = 11,743.19

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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.