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Finding the Fourth Proportional to 10,959.80, 16,420.80 and 5,104.40

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Solution

The fourth proportional to 10,959.80, 16,420.80 and 5,104.40 is: 7,647.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,959.80 : 16,420.80 = 5,104.40 : x
  2. Step 2: Convert to fraction form
    10,959.80/16,420.80 = 5,104.40/x
  3. Step 3: Cross multiply
    10,959.80x = 16,420.80 × 5,104.40
  4. Step 4: Simplify right side
    10,959.80x = 83,818,331.52
  5. Step 5: Solve for x
    x = 83,818,331.52/10,959.80
  6. Step 6: Final answer
    x = 7,647.80

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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.