Home / 11,578.72-15,980.08-6,864.80

Finding the Fourth Proportional to 11,578.72, 15,980.08 and 6,864.80

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Solution

The fourth proportional to 11,578.72, 15,980.08 and 6,864.80 is: 9,474.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,578.72 : 15,980.08 = 6,864.80 : x
  2. Step 2: Convert to fraction form
    11,578.72/15,980.08 = 6,864.80/x
  3. Step 3: Cross multiply
    11,578.72x = 15,980.08 × 6,864.80
  4. Step 4: Simplify right side
    11,578.72x = 109,700,053.18
  5. Step 5: Solve for x
    x = 109,700,053.18/11,578.72
  6. Step 6: Final answer
    x = 9,474.28

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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.