Home / 15,572.21-21,490.15-8,857.66

Finding the Fourth Proportional to 15,572.21, 21,490.15 and 8,857.66

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Solution

The fourth proportional to 15,572.21, 21,490.15 and 8,857.66 is: 12,223.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,572.21 : 21,490.15 = 8,857.66 : x
  2. Step 2: Convert to fraction form
    15,572.21/21,490.15 = 8,857.66/x
  3. Step 3: Cross multiply
    15,572.21x = 21,490.15 × 8,857.66
  4. Step 4: Simplify right side
    15,572.21x = 190,352,471.07
  5. Step 5: Solve for x
    x = 190,352,471.07/15,572.21
  6. Step 6: Final answer
    x = 12,223.86

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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.