Home / 20,710.02-28,579.86-11,278.62

Finding the Fourth Proportional to 20,710.02, 28,579.86 and 11,278.62

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Solution

The fourth proportional to 20,710.02, 28,579.86 and 11,278.62 is: 15,564.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.02 : 28,579.86 = 11,278.62 : x
  2. Step 2: Convert to fraction form
    20,710.02/28,579.86 = 11,278.62/x
  3. Step 3: Cross multiply
    20,710.02x = 28,579.86 × 11,278.62
  4. Step 4: Simplify right side
    20,710.02x = 322,341,380.59
  5. Step 5: Solve for x
    x = 322,341,380.59/20,710.02
  6. Step 6: Final answer
    x = 15,564.51

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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.