Home / 20,703.79-28,571.02-11,272.29

Finding the Fourth Proportional to 20,703.79, 28,571.02 and 11,272.29

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Solution

The fourth proportional to 20,703.79, 28,571.02 and 11,272.29 is: 15,555.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.79 : 28,571.02 = 11,272.29 : x
  2. Step 2: Convert to fraction form
    20,703.79/28,571.02 = 11,272.29/x
  3. Step 3: Cross multiply
    20,703.79x = 28,571.02 × 11,272.29
  4. Step 4: Simplify right side
    20,703.79x = 322,060,823.04
  5. Step 5: Solve for x
    x = 322,060,823.04/20,703.79
  6. Step 6: Final answer
    x = 15,555.65

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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.