Home / 21,620.64-29,841.12-13,657.80

Finding the Fourth Proportional to 21,620.64, 29,841.12 and 13,657.80

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Solution

The fourth proportional to 21,620.64, 29,841.12 and 13,657.80 is: 18,850.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.64 : 29,841.12 = 13,657.80 : x
  2. Step 2: Convert to fraction form
    21,620.64/29,841.12 = 13,657.80/x
  3. Step 3: Cross multiply
    21,620.64x = 29,841.12 × 13,657.80
  4. Step 4: Simplify right side
    21,620.64x = 407,564,048.74
  5. Step 5: Solve for x
    x = 407,564,048.74/21,620.64
  6. Step 6: Final answer
    x = 18,850.69

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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.