Home / 28,220-38,943.87-15,645.02

Finding the Fourth Proportional to 28,220, 38,943.87 and 15,645.02

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Solution

The fourth proportional to 28,220, 38,943.87 and 15,645.02 is: 21,590.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220 : 38,943.87 = 15,645.02 : x
  2. Step 2: Convert to fraction form
    28,220/38,943.87 = 15,645.02/x
  3. Step 3: Cross multiply
    28,220x = 38,943.87 × 15,645.02
  4. Step 4: Simplify right side
    28,220x = 609,277,625.03
  5. Step 5: Solve for x
    x = 609,277,625.03/28,220
  6. Step 6: Final answer
    x = 21,590.28

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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.