Home / 28,465.92-39,283.20-15,890.40

Finding the Fourth Proportional to 28,465.92, 39,283.20 and 15,890.40

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Solution

The fourth proportional to 28,465.92, 39,283.20 and 15,890.40 is: 21,928.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,465.92 : 39,283.20 = 15,890.40 : x
  2. Step 2: Convert to fraction form
    28,465.92/39,283.20 = 15,890.40/x
  3. Step 3: Cross multiply
    28,465.92x = 39,283.20 × 15,890.40
  4. Step 4: Simplify right side
    28,465.92x = 624,225,761.28
  5. Step 5: Solve for x
    x = 624,225,761.28/28,465.92
  6. Step 6: Final answer
    x = 21,928.88

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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.