Home / 15,445.50-21,313.68-8,731.38

Finding the Fourth Proportional to 15,445.50, 21,313.68 and 8,731.38

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Solution

The fourth proportional to 15,445.50, 21,313.68 and 8,731.38 is: 12,048.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.50 : 21,313.68 = 8,731.38 : x
  2. Step 2: Convert to fraction form
    15,445.50/21,313.68 = 8,731.38/x
  3. Step 3: Cross multiply
    15,445.50x = 21,313.68 × 8,731.38
  4. Step 4: Simplify right side
    15,445.50x = 186,097,839.28
  5. Step 5: Solve for x
    x = 186,097,839.28/15,445.50
  6. Step 6: Final answer
    x = 12,048.68

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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.