Home / 20,659.79-28,510.68-11,228.34

Finding the Fourth Proportional to 20,659.79, 28,510.68 and 11,228.34

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Solution

The fourth proportional to 20,659.79, 28,510.68 and 11,228.34 is: 15,495.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.79 : 28,510.68 = 11,228.34 : x
  2. Step 2: Convert to fraction form
    20,659.79/28,510.68 = 11,228.34/x
  3. Step 3: Cross multiply
    20,659.79x = 28,510.68 × 11,228.34
  4. Step 4: Simplify right side
    20,659.79x = 320,127,608.67
  5. Step 5: Solve for x
    x = 320,127,608.67/20,659.79
  6. Step 6: Final answer
    x = 15,495.21

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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.