Home / 15,283.20-21,084.60-8,908.80

Finding the Fourth Proportional to 15,283.20, 21,084.60 and 8,908.80

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Solution

The fourth proportional to 15,283.20, 21,084.60 and 8,908.80 is: 12,290.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,283.20 : 21,084.60 = 8,908.80 : x
  2. Step 2: Convert to fraction form
    15,283.20/21,084.60 = 8,908.80/x
  3. Step 3: Cross multiply
    15,283.20x = 21,084.60 × 8,908.80
  4. Step 4: Simplify right side
    15,283.20x = 187,838,484.48
  5. Step 5: Solve for x
    x = 187,838,484.48/15,283.20
  6. Step 6: Final answer
    x = 12,290.52

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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.