Home / 28,240.64-38,972.80-15,665.60

Finding the Fourth Proportional to 28,240.64, 38,972.80 and 15,665.60

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Solution

The fourth proportional to 28,240.64, 38,972.80 and 15,665.60 is: 21,618.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.64 : 38,972.80 = 15,665.60 : x
  2. Step 2: Convert to fraction form
    28,240.64/38,972.80 = 15,665.60/x
  3. Step 3: Cross multiply
    28,240.64x = 38,972.80 × 15,665.60
  4. Step 4: Simplify right side
    28,240.64x = 610,532,295.68
  5. Step 5: Solve for x
    x = 610,532,295.68/28,240.64
  6. Step 6: Final answer
    x = 21,618.93

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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.