Home / 20,799.78-28,703.73-11,368.32

Finding the Fourth Proportional to 20,799.78, 28,703.73 and 11,368.32

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Solution

The fourth proportional to 20,799.78, 28,703.73 and 11,368.32 is: 15,688.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.78 : 28,703.73 = 11,368.32 : x
  2. Step 2: Convert to fraction form
    20,799.78/28,703.73 = 11,368.32/x
  3. Step 3: Cross multiply
    20,799.78x = 28,703.73 × 11,368.32
  4. Step 4: Simplify right side
    20,799.78x = 326,313,187.83
  5. Step 5: Solve for x
    x = 326,313,187.83/20,799.78
  6. Step 6: Final answer
    x = 15,688.30

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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.