Home / 28,829.72-39,782.04-21,280.04

Finding the Fourth Proportional to 28,829.72, 39,782.04 and 21,280.04

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Solution

The fourth proportional to 28,829.72, 39,782.04 and 21,280.04 is: 29,364.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,829.72 : 39,782.04 = 21,280.04 : x
  2. Step 2: Convert to fraction form
    28,829.72/39,782.04 = 21,280.04/x
  3. Step 3: Cross multiply
    28,829.72x = 39,782.04 × 21,280.04
  4. Step 4: Simplify right side
    28,829.72x = 846,563,402.48
  5. Step 5: Solve for x
    x = 846,563,402.48/28,829.72
  6. Step 6: Final answer
    x = 29,364.26

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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.