Home / 28,686.11-39,575.76-21,150.35

Finding the Fourth Proportional to 28,686.11, 39,575.76 and 21,150.35

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Solution

The fourth proportional to 28,686.11, 39,575.76 and 21,150.35 is: 29,179.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.11 : 39,575.76 = 21,150.35 : x
  2. Step 2: Convert to fraction form
    28,686.11/39,575.76 = 21,150.35/x
  3. Step 3: Cross multiply
    28,686.11x = 39,575.76 × 21,150.35
  4. Step 4: Simplify right side
    28,686.11x = 837,041,175.52
  5. Step 5: Solve for x
    x = 837,041,175.52/28,686.11
  6. Step 6: Final answer
    x = 29,179.32

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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.