Home / 15,645.12-21,590.48-8,571.40

Finding the Fourth Proportional to 15,645.12, 21,590.48 and 8,571.40

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Solution

The fourth proportional to 15,645.12, 21,590.48 and 8,571.40 is: 11,828.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,645.12 : 21,590.48 = 8,571.40 : x
  2. Step 2: Convert to fraction form
    15,645.12/21,590.48 = 8,571.40/x
  3. Step 3: Cross multiply
    15,645.12x = 21,590.48 × 8,571.40
  4. Step 4: Simplify right side
    15,645.12x = 185,060,640.27
  5. Step 5: Solve for x
    x = 185,060,640.27/15,645.12
  6. Step 6: Final answer
    x = 11,828.65

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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.