Home / 15,315.33-21,155.43-11,356.86

Finding the Fourth Proportional to 15,315.33, 21,155.43 and 11,356.86

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Solution

The fourth proportional to 15,315.33, 21,155.43 and 11,356.86 is: 15,687.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.33 : 21,155.43 = 11,356.86 : x
  2. Step 2: Convert to fraction form
    15,315.33/21,155.43 = 11,356.86/x
  3. Step 3: Cross multiply
    15,315.33x = 21,155.43 × 11,356.86
  4. Step 4: Simplify right side
    15,315.33x = 240,259,256.75
  5. Step 5: Solve for x
    x = 240,259,256.75/15,315.33
  6. Step 6: Final answer
    x = 15,687.50

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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.