Home / 20,970.29-28,938.95-11,538.85

Finding the Fourth Proportional to 20,970.29, 28,938.95 and 11,538.85

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Solution

The fourth proportional to 20,970.29, 28,938.95 and 11,538.85 is: 15,923.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.29 : 28,938.95 = 11,538.85 : x
  2. Step 2: Convert to fraction form
    20,970.29/28,938.95 = 11,538.85/x
  3. Step 3: Cross multiply
    20,970.29x = 28,938.95 × 11,538.85
  4. Step 4: Simplify right side
    20,970.29x = 333,922,073.17
  5. Step 5: Solve for x
    x = 333,922,073.17/20,970.29
  6. Step 6: Final answer
    x = 15,923.58

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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.