Home / 8,478.78-11,700.96-5,122.19

Finding the Fourth Proportional to 8,478.78, 11,700.96 and 5,122.19

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Solution

The fourth proportional to 8,478.78, 11,700.96 and 5,122.19 is: 7,068.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.78 : 11,700.96 = 5,122.19 : x
  2. Step 2: Convert to fraction form
    8,478.78/11,700.96 = 5,122.19/x
  3. Step 3: Cross multiply
    8,478.78x = 11,700.96 × 5,122.19
  4. Step 4: Simplify right side
    8,478.78x = 59,934,550.35
  5. Step 5: Solve for x
    x = 59,934,550.35/8,478.78
  6. Step 6: Final answer
    x = 7,068.77

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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.