Home / 11,587.50-15,990.78-6,872.10

Finding the Fourth Proportional to 11,587.50, 15,990.78 and 6,872.10

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Solution

The fourth proportional to 11,587.50, 15,990.78 and 6,872.10 is: 9,483.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,587.50 : 15,990.78 = 6,872.10 : x
  2. Step 2: Convert to fraction form
    11,587.50/15,990.78 = 6,872.10/x
  3. Step 3: Cross multiply
    11,587.50x = 15,990.78 × 6,872.10
  4. Step 4: Simplify right side
    11,587.50x = 109,890,239.24
  5. Step 5: Solve for x
    x = 109,890,239.24/11,587.50
  6. Step 6: Final answer
    x = 9,483.52

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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.