Home / 20,804.72-28,712.50-11,374.70

Finding the Fourth Proportional to 20,804.72, 28,712.50 and 11,374.70

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Solution

The fourth proportional to 20,804.72, 28,712.50 and 11,374.70 is: 15,698.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.72 : 28,712.50 = 11,374.70 : x
  2. Step 2: Convert to fraction form
    20,804.72/28,712.50 = 11,374.70/x
  3. Step 3: Cross multiply
    20,804.72x = 28,712.50 × 11,374.70
  4. Step 4: Simplify right side
    20,804.72x = 326,596,073.75
  5. Step 5: Solve for x
    x = 326,596,073.75/20,804.72
  6. Step 6: Final answer
    x = 15,698.17

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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.