Home / 39,657.72-54,731.16-21,756.21

Finding the Fourth Proportional to 39,657.72, 54,731.16 and 21,756.21

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Solution

The fourth proportional to 39,657.72, 54,731.16 and 21,756.21 is: 30,025.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,657.72 : 54,731.16 = 21,756.21 : x
  2. Step 2: Convert to fraction form
    39,657.72/54,731.16 = 21,756.21/x
  3. Step 3: Cross multiply
    39,657.72x = 54,731.16 × 21,756.21
  4. Step 4: Simplify right side
    39,657.72x = 1,190,742,610.50
  5. Step 5: Solve for x
    x = 1,190,742,610.50/39,657.72
  6. Step 6: Final answer
    x = 30,025.49

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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.