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Finding the Fourth Proportional to 28,947.16, 43,423.86 and 9,218.80

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Solution

The fourth proportional to 28,947.16, 43,423.86 and 9,218.80 is: 13,829.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,947.16 : 43,423.86 = 9,218.80 : x
  2. Step 2: Convert to fraction form
    28,947.16/43,423.86 = 9,218.80/x
  3. Step 3: Cross multiply
    28,947.16x = 43,423.86 × 9,218.80
  4. Step 4: Simplify right side
    28,947.16x = 400,315,880.57
  5. Step 5: Solve for x
    x = 400,315,880.57/28,947.16
  6. Step 6: Final answer
    x = 13,829.19

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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.