Home / 15,775.72-21,763.60-10,391.20

Finding the Fourth Proportional to 15,775.72, 21,763.60 and 10,391.20

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Solution

The fourth proportional to 15,775.72, 21,763.60 and 10,391.20 is: 14,335.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,775.72 : 21,763.60 = 10,391.20 : x
  2. Step 2: Convert to fraction form
    15,775.72/21,763.60 = 10,391.20/x
  3. Step 3: Cross multiply
    15,775.72x = 21,763.60 × 10,391.20
  4. Step 4: Simplify right side
    15,775.72x = 226,149,920.32
  5. Step 5: Solve for x
    x = 226,149,920.32/15,775.72
  6. Step 6: Final answer
    x = 14,335.32

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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.