Home / 28,318.70-39,090.41-21,265.50

Finding the Fourth Proportional to 28,318.70, 39,090.41 and 21,265.50

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Solution

The fourth proportional to 28,318.70, 39,090.41 and 21,265.50 is: 29,354.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.70 : 39,090.41 = 21,265.50 : x
  2. Step 2: Convert to fraction form
    28,318.70/39,090.41 = 21,265.50/x
  3. Step 3: Cross multiply
    28,318.70x = 39,090.41 × 21,265.50
  4. Step 4: Simplify right side
    28,318.70x = 831,277,113.86
  5. Step 5: Solve for x
    x = 831,277,113.86/28,318.70
  6. Step 6: Final answer
    x = 29,354.35

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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.