Home / 20,718.79-28,591.77-11,287.35

Finding the Fourth Proportional to 20,718.79, 28,591.77 and 11,287.35

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Solution

The fourth proportional to 20,718.79, 28,591.77 and 11,287.35 is: 15,576.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.79 : 28,591.77 = 11,287.35 : x
  2. Step 2: Convert to fraction form
    20,718.79/28,591.77 = 11,287.35/x
  3. Step 3: Cross multiply
    20,718.79x = 28,591.77 × 11,287.35
  4. Step 4: Simplify right side
    20,718.79x = 322,725,315.11
  5. Step 5: Solve for x
    x = 322,725,315.11/20,718.79
  6. Step 6: Final answer
    x = 15,576.46

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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.