Home / 28,828.04-39,782.62-15,580.04

Finding the Fourth Proportional to 28,828.04, 39,782.62 and 15,580.04

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Solution

The fourth proportional to 28,828.04, 39,782.62 and 15,580.04 is: 21,500.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,828.04 : 39,782.62 = 15,580.04 : x
  2. Step 2: Convert to fraction form
    28,828.04/39,782.62 = 15,580.04/x
  3. Step 3: Cross multiply
    28,828.04x = 39,782.62 × 15,580.04
  4. Step 4: Simplify right side
    28,828.04x = 619,814,810.90
  5. Step 5: Solve for x
    x = 619,814,810.90/28,828.04
  6. Step 6: Final answer
    x = 21,500.41

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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.