Home / 15,775.20-21,772.80-11,541.60

Finding the Fourth Proportional to 15,775.20, 21,772.80 and 11,541.60

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Solution

The fourth proportional to 15,775.20, 21,772.80 and 11,541.60 is: 15,929.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,775.20 : 21,772.80 = 11,541.60 : x
  2. Step 2: Convert to fraction form
    15,775.20/21,772.80 = 11,541.60/x
  3. Step 3: Cross multiply
    15,775.20x = 21,772.80 × 11,541.60
  4. Step 4: Simplify right side
    15,775.20x = 251,292,948.48
  5. Step 5: Solve for x
    x = 251,292,948.48/15,775.20
  6. Step 6: Final answer
    x = 15,929.62

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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.