Home / 28,569.13-39,419.80-15,821.70

Finding the Fourth Proportional to 28,569.13, 39,419.80 and 15,821.70

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Solution

The fourth proportional to 28,569.13, 39,419.80 and 15,821.70 is: 21,830.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,569.13 : 39,419.80 = 15,821.70 : x
  2. Step 2: Convert to fraction form
    28,569.13/39,419.80 = 15,821.70/x
  3. Step 3: Cross multiply
    28,569.13x = 39,419.80 × 15,821.70
  4. Step 4: Simplify right side
    28,569.13x = 623,688,249.66
  5. Step 5: Solve for x
    x = 623,688,249.66/28,569.13
  6. Step 6: Final answer
    x = 21,830.85

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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.