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Finding the Fourth Proportional to 39,366.40, 58,905.60 and 28,998.40

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Solution

The fourth proportional to 39,366.40, 58,905.60 and 28,998.40 is: 43,391.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,366.40 : 58,905.60 = 28,998.40 : x
  2. Step 2: Convert to fraction form
    39,366.40/58,905.60 = 28,998.40/x
  3. Step 3: Cross multiply
    39,366.40x = 58,905.60 × 28,998.40
  4. Step 4: Simplify right side
    39,366.40x = 1,708,168,151.04
  5. Step 5: Solve for x
    x = 1,708,168,151.04/39,366.40
  6. Step 6: Final answer
    x = 43,391.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.