Home / 15,280.80-21,087.30-8,566.68

Finding the Fourth Proportional to 15,280.80, 21,087.30 and 8,566.68

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Solution

The fourth proportional to 15,280.80, 21,087.30 and 8,566.68 is: 11,821.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,280.80 : 21,087.30 = 8,566.68 : x
  2. Step 2: Convert to fraction form
    15,280.80/21,087.30 = 8,566.68/x
  3. Step 3: Cross multiply
    15,280.80x = 21,087.30 × 8,566.68
  4. Step 4: Simplify right side
    15,280.80x = 180,648,151.16
  5. Step 5: Solve for x
    x = 180,648,151.16/15,280.80
  6. Step 6: Final answer
    x = 11,821.90

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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.