Home / 28,166.92-38,870.43-15,420.21

Finding the Fourth Proportional to 28,166.92, 38,870.43 and 15,420.21

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Solution

The fourth proportional to 28,166.92, 38,870.43 and 15,420.21 is: 21,279.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,166.92 : 38,870.43 = 15,420.21 : x
  2. Step 2: Convert to fraction form
    28,166.92/38,870.43 = 15,420.21/x
  3. Step 3: Cross multiply
    28,166.92x = 38,870.43 × 15,420.21
  4. Step 4: Simplify right side
    28,166.92x = 599,390,193.39
  5. Step 5: Solve for x
    x = 599,390,193.39/28,166.92
  6. Step 6: Final answer
    x = 21,279.94

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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.