Home / 15,617.94-21,565.89-11,155.38

Finding the Fourth Proportional to 15,617.94, 21,565.89 and 11,155.38

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Solution

The fourth proportional to 15,617.94, 21,565.89 and 11,155.38 is: 15,403.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,617.94 : 21,565.89 = 11,155.38 : x
  2. Step 2: Convert to fraction form
    15,617.94/21,565.89 = 11,155.38/x
  3. Step 3: Cross multiply
    15,617.94x = 21,565.89 × 11,155.38
  4. Step 4: Simplify right side
    15,617.94x = 240,575,697.99
  5. Step 5: Solve for x
    x = 240,575,697.99/15,617.94
  6. Step 6: Final answer
    x = 15,403.80

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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.