Home / 28,686.24-39,575.95-21,150.45

Finding the Fourth Proportional to 28,686.24, 39,575.95 and 21,150.45

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Solution

The fourth proportional to 28,686.24, 39,575.95 and 21,150.45 is: 29,179.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.24 : 39,575.95 = 21,150.45 : x
  2. Step 2: Convert to fraction form
    28,686.24/39,575.95 = 21,150.45/x
  3. Step 3: Cross multiply
    28,686.24x = 39,575.95 × 21,150.45
  4. Step 4: Simplify right side
    28,686.24x = 837,049,151.68
  5. Step 5: Solve for x
    x = 837,049,151.68/28,686.24
  6. Step 6: Final answer
    x = 29,179.47

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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.