Home / 20,659.95-28,510.38-11,228.49

Finding the Fourth Proportional to 20,659.95, 28,510.38 and 11,228.49

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Solution

The fourth proportional to 20,659.95, 28,510.38 and 11,228.49 is: 15,495.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.95 : 28,510.38 = 11,228.49 : x
  2. Step 2: Convert to fraction form
    20,659.95/28,510.38 = 11,228.49/x
  3. Step 3: Cross multiply
    20,659.95x = 28,510.38 × 11,228.49
  4. Step 4: Simplify right side
    20,659.95x = 320,128,516.73
  5. Step 5: Solve for x
    x = 320,128,516.73/20,659.95
  6. Step 6: Final answer
    x = 15,495.13

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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.