Home / 28,245.74-38,977.80-15,498.64

Finding the Fourth Proportional to 28,245.74, 38,977.80 and 15,498.64

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Solution

The fourth proportional to 28,245.74, 38,977.80 and 15,498.64 is: 21,387.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,245.74 : 38,977.80 = 15,498.64 : x
  2. Step 2: Convert to fraction form
    28,245.74/38,977.80 = 15,498.64/x
  3. Step 3: Cross multiply
    28,245.74x = 38,977.80 × 15,498.64
  4. Step 4: Simplify right side
    28,245.74x = 604,102,695.30
  5. Step 5: Solve for x
    x = 604,102,695.30/28,245.74
  6. Step 6: Final answer
    x = 21,387.39

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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.