Home / 21,468.80-29,628.96-12,515.60

Finding the Fourth Proportional to 21,468.80, 29,628.96 and 12,515.60

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Solution

The fourth proportional to 21,468.80, 29,628.96 and 12,515.60 is: 17,272.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,468.80 : 29,628.96 = 12,515.60 : x
  2. Step 2: Convert to fraction form
    21,468.80/29,628.96 = 12,515.60/x
  3. Step 3: Cross multiply
    21,468.80x = 29,628.96 × 12,515.60
  4. Step 4: Simplify right side
    21,468.80x = 370,824,211.78
  5. Step 5: Solve for x
    x = 370,824,211.78/21,468.80
  6. Step 6: Final answer
    x = 17,272.70

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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.