Home / 39,420.57-54,398.08-21,511.98

Finding the Fourth Proportional to 39,420.57, 54,398.08 and 21,511.98

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Solution

The fourth proportional to 39,420.57, 54,398.08 and 21,511.98 is: 29,685.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,420.57 : 54,398.08 = 21,511.98 : x
  2. Step 2: Convert to fraction form
    39,420.57/54,398.08 = 21,511.98/x
  3. Step 3: Cross multiply
    39,420.57x = 54,398.08 × 21,511.98
  4. Step 4: Simplify right side
    39,420.57x = 1,170,210,435.89
  5. Step 5: Solve for x
    x = 1,170,210,435.89/39,420.57
  6. Step 6: Final answer
    x = 29,685.27

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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.