Home / 15,775.86-21,703.60-15,338.46

Finding the Fourth Proportional to 15,775.86, 21,703.60 and 15,338.46

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Solution

The fourth proportional to 15,775.86, 21,703.60 and 15,338.46 is: 21,101.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,775.86 : 21,703.60 = 15,338.46 : x
  2. Step 2: Convert to fraction form
    15,775.86/21,703.60 = 15,338.46/x
  3. Step 3: Cross multiply
    15,775.86x = 21,703.60 × 15,338.46
  4. Step 4: Simplify right side
    15,775.86x = 332,899,800.46
  5. Step 5: Solve for x
    x = 332,899,800.46/15,775.86
  6. Step 6: Final answer
    x = 21,101.85

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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.