Home / 28,003.86-38,645.32-15,428.60

Finding the Fourth Proportional to 28,003.86, 38,645.32 and 15,428.60

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Solution

The fourth proportional to 28,003.86, 38,645.32 and 15,428.60 is: 21,291.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,003.86 : 38,645.32 = 15,428.60 : x
  2. Step 2: Convert to fraction form
    28,003.86/38,645.32 = 15,428.60/x
  3. Step 3: Cross multiply
    28,003.86x = 38,645.32 × 15,428.60
  4. Step 4: Simplify right side
    28,003.86x = 596,243,184.15
  5. Step 5: Solve for x
    x = 596,243,184.15/28,003.86
  6. Step 6: Final answer
    x = 21,291.46

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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.