Home / 15,830.20-21,845.58-8,756.47

Finding the Fourth Proportional to 15,830.20, 21,845.58 and 8,756.47

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Solution

The fourth proportional to 15,830.20, 21,845.58 and 8,756.47 is: 12,083.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,830.20 : 21,845.58 = 8,756.47 : x
  2. Step 2: Convert to fraction form
    15,830.20/21,845.58 = 8,756.47/x
  3. Step 3: Cross multiply
    15,830.20x = 21,845.58 × 8,756.47
  4. Step 4: Simplify right side
    15,830.20x = 191,290,056.67
  5. Step 5: Solve for x
    x = 191,290,056.67/15,830.20
  6. Step 6: Final answer
    x = 12,083.87

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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.