Home / 18,276.81-27,415.62-5,128.89

Finding the Fourth Proportional to 18,276.81, 27,415.62 and 5,128.89

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Solution

The fourth proportional to 18,276.81, 27,415.62 and 5,128.89 is: 7,693.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,276.81 : 27,415.62 = 5,128.89 : x
  2. Step 2: Convert to fraction form
    18,276.81/27,415.62 = 5,128.89/x
  3. Step 3: Cross multiply
    18,276.81x = 27,415.62 × 5,128.89
  4. Step 4: Simplify right side
    18,276.81x = 140,611,699.26
  5. Step 5: Solve for x
    x = 140,611,699.26/18,276.81
  6. Step 6: Final answer
    x = 7,693.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.