Home / 39,215.76-54,124.20-28,640.40

Finding the Fourth Proportional to 39,215.76, 54,124.20 and 28,640.40

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Solution

The fourth proportional to 39,215.76, 54,124.20 and 28,640.40 is: 39,528.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,215.76 : 54,124.20 = 28,640.40 : x
  2. Step 2: Convert to fraction form
    39,215.76/54,124.20 = 28,640.40/x
  3. Step 3: Cross multiply
    39,215.76x = 54,124.20 × 28,640.40
  4. Step 4: Simplify right side
    39,215.76x = 1,550,138,737.68
  5. Step 5: Solve for x
    x = 1,550,138,737.68/39,215.76
  6. Step 6: Final answer
    x = 39,528.46

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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.