Home / 28,392.81-39,181.56-15,647.17

Finding the Fourth Proportional to 28,392.81, 39,181.56 and 15,647.17

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Solution

The fourth proportional to 28,392.81, 39,181.56 and 15,647.17 is: 21,592.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,392.81 : 39,181.56 = 15,647.17 : x
  2. Step 2: Convert to fraction form
    28,392.81/39,181.56 = 15,647.17/x
  3. Step 3: Cross multiply
    28,392.81x = 39,181.56 × 15,647.17
  4. Step 4: Simplify right side
    28,392.81x = 613,080,530.19
  5. Step 5: Solve for x
    x = 613,080,530.19/28,392.81
  6. Step 6: Final answer
    x = 21,592.81

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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.