Home / 15,571.13-21,488.75-8,857.37

Finding the Fourth Proportional to 15,571.13, 21,488.75 and 8,857.37

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Solution

The fourth proportional to 15,571.13, 21,488.75 and 8,857.37 is: 12,223.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,571.13 : 21,488.75 = 8,857.37 : x
  2. Step 2: Convert to fraction form
    15,571.13/21,488.75 = 8,857.37/x
  3. Step 3: Cross multiply
    15,571.13x = 21,488.75 × 8,857.37
  4. Step 4: Simplify right side
    15,571.13x = 190,333,657.86
  5. Step 5: Solve for x
    x = 190,333,657.86/15,571.13
  6. Step 6: Final answer
    x = 12,223.50

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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.