Home / 28,346.64-39,127.32-19,390.80

Finding the Fourth Proportional to 28,346.64, 39,127.32 and 19,390.80

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Solution

The fourth proportional to 28,346.64, 39,127.32 and 19,390.80 is: 26,765.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,346.64 : 39,127.32 = 19,390.80 : x
  2. Step 2: Convert to fraction form
    28,346.64/39,127.32 = 19,390.80/x
  3. Step 3: Cross multiply
    28,346.64x = 39,127.32 × 19,390.80
  4. Step 4: Simplify right side
    28,346.64x = 758,710,036.66
  5. Step 5: Solve for x
    x = 758,710,036.66/28,346.64
  6. Step 6: Final answer
    x = 26,765.43

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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.